diff --git a/Cargo.lock b/Cargo.lock
index c432058..e5329e4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -6,148 +6,11 @@ version = 3
 name = "adventofcode22"
 version = "0.1.0"
 dependencies = [
- "itertools",
- "once_cell",
  "path_macro",
- "regex",
- "rstest",
 ]
 
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-dependencies = [
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-]
-
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-version = "1.0.0"
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-checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
-
-[[package]]
-name = "either"
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "90e5c1c8368803113bf0c9584fc495a58b86dc8a29edbf8fe877d21d9507e797"
-
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-name = "itertools"
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diff --git a/Cargo.toml b/Cargo.toml
index 7e1f818..2a33956 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,11 +3,7 @@ name = "adventofcode22"
 version = "0.1.0"
 edition = "2021"
 
-[dependencies]
-itertools = "0.10.5"
-once_cell = "1.16.0"
-path_macro = "1.0.0"
-regex = "1.7.0"
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
-[dev-dependencies]
-rstest = { version = "0.16.0", default-features = false }
+[dependencies]
+path_macro = "1.0.0"
diff --git a/example/day7.txt b/example/day7.txt
deleted file mode 100644
index 09a921e..0000000
--- a/example/day7.txt
+++ /dev/null
@@ -1,23 +0,0 @@
-$ cd /
-$ ls
-dir a
-14848514 b.txt
-8504156 c.dat
-dir d
-$ cd a
-$ ls
-dir e
-29116 f
-2557 g
-62596 h.lst
-$ cd e
-$ ls
-584 i
-$ cd ..
-$ cd ..
-$ cd d
-$ ls
-4060174 j
-8033020 d.log
-5626152 d.ext
-7214296 k
diff --git a/example/day8.txt b/example/day8.txt
deleted file mode 100644
index 16d6fbd..0000000
--- a/example/day8.txt
+++ /dev/null
@@ -1,5 +0,0 @@
-30373
-25512
-65332
-33549
-35390
diff --git a/example/day9.txt b/example/day9.txt
deleted file mode 100644
index 9874df2..0000000
--- a/example/day9.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-R 4
-U 4
-L 3
-D 1
-R 4
-D 1
-L 5
-R 2
diff --git a/input/day0.txt b/input/day0.txt
deleted file mode 100644
index ce8c77d..0000000
--- a/input/day0.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-123
-456
diff --git a/input/day2.txt b/input/day2.txt
deleted file mode 100644
index 4e0cd35..0000000
--- a/input/day2.txt
+++ /dev/null
@@ -1,2500 +0,0 @@
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diff --git a/input/day3.txt b/input/day3.txt
deleted file mode 100644
index fca63f0..0000000
--- a/input/day3.txt
+++ /dev/null
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diff --git a/input/day4.txt b/input/day4.txt
deleted file mode 100644
index f1311b8..0000000
--- a/input/day4.txt
+++ /dev/null
@@ -1,1000 +0,0 @@
-31-31,32-40
-26-92,13-91
-9-90,29-91
-72-72,25-73
-28-79,79-79
-52-77,53-53
-17-54,17-54
-11-47,4-10
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-38-99,39-63
-19-54,18-53
-1-73,1-73
-17-34,18-34
-93-93,25-94
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-19-85,20-20
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-79-91,80-95
-32-89,32-82
-3-96,2-4
-70-83,15-70
-5-90,8-91
-16-60,16-61
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-68-88,67-69
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-35-62,27-61
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-17-33,13-70
-78-93,78-78
-3-50,2-50
-8-8,8-84
-33-97,33-96
-51-53,52-87
-21-42,22-42
-98-99,2-98
-8-99,8-97
-41-51,41-51
-20-75,68-74
-2-98,98-99
-46-95,68-88
-16-69,68-97
-41-96,95-97
-1-98,1-98
-35-93,35-97
-54-66,1-97
-29-98,29-97
-44-44,44-67
-7-69,69-69
-3-74,73-73
-8-78,9-75
-43-51,51-52
-13-49,48-48
-42-76,3-76
-16-50,9-55
-62-71,62-71
-79-98,7-66
-43-58,58-58
-25-30,25-54
-2-17,16-27
-88-99,15-87
-33-94,94-94
-9-11,10-43
-38-97,39-95
-17-58,18-57
-25-97,17-62
-9-19,10-26
-87-88,86-87
-23-58,22-59
-49-96,49-49
-64-81,31-70
-3-85,2-86
-10-10,9-28
-9-51,5-9
-49-57,48-57
-1-65,3-66
-54-70,70-71
-2-61,1-60
-90-98,57-91
diff --git a/input/day5.txt b/input/day5.txt
deleted file mode 100644
index 0d3bcf4..0000000
--- a/input/day5.txt
+++ /dev/null
@@ -1,511 +0,0 @@
-        [J]         [B]     [T]    
-        [M] [L]     [Q] [L] [R]    
-        [G] [Q]     [W] [S] [B] [L]
-[D]     [D] [T]     [M] [G] [V] [P]
-[T]     [N] [N] [N] [D] [J] [G] [N]
-[W] [H] [H] [S] [C] [N] [R] [W] [D]
-[N] [P] [P] [W] [H] [H] [B] [N] [G]
-[L] [C] [W] [C] [P] [T] [M] [Z] [W]
- 1   2   3   4   5   6   7   8   9 
-
-move 6 from 6 to 5
-move 2 from 5 to 9
-move 8 from 9 to 1
-move 3 from 5 to 4
-move 9 from 1 to 8
-move 2 from 1 to 5
-move 1 from 1 to 8
-move 14 from 8 to 2
-move 1 from 1 to 2
-move 2 from 6 to 8
-move 2 from 5 to 7
-move 6 from 8 to 6
-move 4 from 4 to 2
-move 2 from 4 to 9
-move 5 from 7 to 4
-move 2 from 7 to 5
-move 6 from 2 to 4
-move 2 from 4 to 7
-move 4 from 5 to 8
-move 1 from 5 to 2
-move 3 from 3 to 5
-move 3 from 8 to 3
-move 4 from 3 to 7
-move 2 from 9 to 8
-move 1 from 3 to 7
-move 1 from 6 to 8
-move 5 from 7 to 1
-move 3 from 7 to 2
-move 1 from 6 to 3
-move 2 from 5 to 9
-move 5 from 4 to 2
-move 3 from 5 to 9
-move 5 from 9 to 6
-move 2 from 1 to 3
-move 4 from 4 to 1
-move 2 from 8 to 1
-move 18 from 2 to 5
-move 3 from 4 to 1
-move 1 from 1 to 2
-move 1 from 6 to 8
-move 1 from 7 to 1
-move 10 from 1 to 5
-move 1 from 1 to 5
-move 3 from 8 to 1
-move 2 from 1 to 5
-move 3 from 6 to 5
-move 8 from 2 to 9
-move 2 from 9 to 7
-move 3 from 3 to 8
-move 1 from 4 to 8
-move 3 from 5 to 3
-move 15 from 5 to 8
-move 4 from 6 to 1
-move 2 from 7 to 4
-move 9 from 5 to 7
-move 1 from 6 to 8
-move 5 from 3 to 5
-move 5 from 7 to 5
-move 3 from 1 to 5
-move 2 from 4 to 8
-move 3 from 1 to 6
-move 20 from 5 to 4
-move 1 from 7 to 6
-move 21 from 8 to 2
-move 1 from 3 to 7
-move 2 from 4 to 2
-move 1 from 7 to 1
-move 18 from 2 to 8
-move 3 from 9 to 2
-move 1 from 6 to 4
-move 1 from 1 to 9
-move 8 from 8 to 6
-move 4 from 8 to 2
-move 1 from 2 to 6
-move 7 from 8 to 5
-move 2 from 5 to 3
-move 1 from 9 to 5
-move 5 from 2 to 4
-move 1 from 3 to 7
-move 2 from 5 to 7
-move 4 from 4 to 9
-move 2 from 5 to 9
-move 6 from 2 to 8
-move 3 from 7 to 3
-move 2 from 5 to 4
-move 4 from 8 to 2
-move 2 from 7 to 4
-move 7 from 6 to 4
-move 1 from 8 to 4
-move 3 from 6 to 7
-move 2 from 7 to 2
-move 7 from 9 to 7
-move 1 from 9 to 2
-move 3 from 3 to 6
-move 3 from 7 to 4
-move 2 from 7 to 9
-move 6 from 4 to 1
-move 3 from 7 to 9
-move 1 from 8 to 5
-move 1 from 3 to 6
-move 3 from 9 to 4
-move 2 from 6 to 4
-move 3 from 9 to 1
-move 4 from 2 to 8
-move 1 from 8 to 5
-move 9 from 1 to 2
-move 1 from 6 to 5
-move 1 from 7 to 2
-move 1 from 8 to 1
-move 2 from 8 to 9
-move 1 from 9 to 8
-move 1 from 5 to 7
-move 1 from 7 to 6
-move 1 from 9 to 8
-move 1 from 6 to 3
-move 26 from 4 to 3
-move 1 from 5 to 8
-move 3 from 6 to 3
-move 7 from 4 to 3
-move 1 from 1 to 3
-move 1 from 4 to 8
-move 13 from 3 to 1
-move 1 from 3 to 4
-move 12 from 2 to 5
-move 20 from 3 to 2
-move 1 from 4 to 1
-move 4 from 5 to 7
-move 1 from 7 to 8
-move 9 from 5 to 2
-move 5 from 1 to 5
-move 21 from 2 to 8
-move 5 from 8 to 4
-move 4 from 5 to 2
-move 6 from 1 to 7
-move 1 from 5 to 4
-move 4 from 3 to 1
-move 6 from 1 to 3
-move 1 from 1 to 9
-move 6 from 8 to 7
-move 4 from 8 to 2
-move 4 from 2 to 7
-move 5 from 4 to 1
-move 8 from 8 to 4
-move 1 from 9 to 6
-move 18 from 7 to 6
-move 15 from 6 to 5
-move 2 from 6 to 8
-move 2 from 6 to 3
-move 8 from 3 to 7
-move 15 from 5 to 7
-move 3 from 4 to 9
-move 12 from 2 to 3
-move 3 from 9 to 4
-move 6 from 7 to 9
-move 9 from 4 to 5
-move 10 from 3 to 5
-move 9 from 5 to 2
-move 14 from 7 to 8
-move 14 from 8 to 5
-move 4 from 2 to 4
-move 1 from 4 to 6
-move 2 from 8 to 4
-move 3 from 8 to 9
-move 18 from 5 to 1
-move 1 from 5 to 9
-move 1 from 7 to 4
-move 5 from 5 to 9
-move 3 from 2 to 4
-move 13 from 9 to 2
-move 13 from 2 to 6
-move 1 from 7 to 3
-move 3 from 3 to 1
-move 9 from 6 to 5
-move 1 from 7 to 8
-move 20 from 1 to 8
-move 2 from 2 to 8
-move 5 from 6 to 9
-move 15 from 8 to 7
-move 3 from 5 to 3
-move 5 from 1 to 3
-move 2 from 3 to 4
-move 3 from 9 to 5
-move 4 from 5 to 2
-move 4 from 5 to 7
-move 3 from 4 to 9
-move 10 from 7 to 8
-move 2 from 9 to 4
-move 1 from 5 to 6
-move 8 from 7 to 9
-move 1 from 6 to 7
-move 6 from 3 to 4
-move 12 from 9 to 8
-move 1 from 1 to 5
-move 2 from 7 to 8
-move 1 from 7 to 5
-move 1 from 9 to 5
-move 2 from 2 to 9
-move 11 from 8 to 1
-move 7 from 1 to 5
-move 3 from 1 to 6
-move 5 from 8 to 9
-move 8 from 4 to 3
-move 4 from 4 to 6
-move 5 from 9 to 3
-move 4 from 4 to 5
-move 2 from 6 to 7
-move 1 from 9 to 5
-move 2 from 7 to 4
-move 12 from 5 to 2
-move 8 from 8 to 9
-move 8 from 8 to 6
-move 9 from 6 to 2
-move 4 from 9 to 2
-move 1 from 5 to 1
-move 5 from 2 to 1
-move 2 from 5 to 4
-move 5 from 2 to 5
-move 5 from 5 to 6
-move 3 from 4 to 7
-move 11 from 2 to 7
-move 2 from 2 to 1
-move 4 from 3 to 7
-move 2 from 2 to 4
-move 6 from 1 to 4
-move 1 from 2 to 8
-move 2 from 9 to 5
-move 4 from 4 to 3
-move 5 from 4 to 1
-move 2 from 2 to 1
-move 1 from 8 to 5
-move 14 from 7 to 6
-move 3 from 9 to 2
-move 15 from 6 to 8
-move 4 from 1 to 3
-move 2 from 2 to 3
-move 1 from 1 to 7
-move 2 from 3 to 5
-move 4 from 5 to 4
-move 1 from 3 to 5
-move 5 from 1 to 6
-move 12 from 6 to 7
-move 7 from 8 to 4
-move 12 from 7 to 9
-move 4 from 7 to 9
-move 1 from 2 to 8
-move 12 from 9 to 4
-move 23 from 4 to 3
-move 1 from 6 to 5
-move 3 from 9 to 3
-move 1 from 7 to 9
-move 1 from 9 to 1
-move 1 from 9 to 7
-move 42 from 3 to 1
-move 3 from 5 to 4
-move 5 from 1 to 3
-move 3 from 4 to 7
-move 1 from 1 to 9
-move 4 from 3 to 8
-move 1 from 3 to 7
-move 1 from 9 to 1
-move 2 from 7 to 8
-move 8 from 1 to 6
-move 2 from 7 to 5
-move 9 from 1 to 2
-move 5 from 2 to 3
-move 3 from 2 to 4
-move 20 from 1 to 2
-move 1 from 1 to 5
-move 1 from 6 to 7
-move 3 from 4 to 7
-move 2 from 3 to 6
-move 3 from 6 to 1
-move 1 from 6 to 4
-move 2 from 1 to 6
-move 3 from 5 to 9
-move 1 from 4 to 3
-move 2 from 7 to 4
-move 6 from 8 to 4
-move 1 from 1 to 9
-move 1 from 2 to 9
-move 2 from 8 to 7
-move 3 from 6 to 2
-move 5 from 7 to 5
-move 4 from 2 to 5
-move 4 from 4 to 6
-move 3 from 9 to 6
-move 4 from 3 to 1
-move 1 from 9 to 2
-move 7 from 8 to 9
-move 4 from 2 to 4
-move 2 from 1 to 7
-move 3 from 4 to 5
-move 4 from 2 to 4
-move 1 from 7 to 4
-move 4 from 2 to 9
-move 7 from 4 to 3
-move 1 from 7 to 3
-move 6 from 2 to 3
-move 2 from 1 to 5
-move 10 from 3 to 6
-move 2 from 6 to 1
-move 2 from 2 to 7
-move 2 from 3 to 1
-move 1 from 7 to 8
-move 11 from 5 to 3
-move 2 from 3 to 1
-move 4 from 6 to 1
-move 1 from 4 to 6
-move 8 from 3 to 4
-move 2 from 5 to 6
-move 3 from 3 to 5
-move 1 from 8 to 4
-move 1 from 4 to 9
-move 2 from 6 to 1
-move 1 from 5 to 1
-move 9 from 4 to 3
-move 5 from 6 to 9
-move 5 from 6 to 7
-move 13 from 9 to 3
-move 5 from 1 to 8
-move 4 from 8 to 4
-move 10 from 3 to 2
-move 3 from 6 to 1
-move 2 from 7 to 9
-move 1 from 8 to 3
-move 1 from 7 to 3
-move 1 from 9 to 5
-move 1 from 6 to 3
-move 7 from 2 to 4
-move 3 from 5 to 2
-move 8 from 3 to 5
-move 7 from 4 to 3
-move 5 from 9 to 7
-move 1 from 7 to 1
-move 9 from 1 to 8
-move 9 from 5 to 8
-move 2 from 7 to 8
-move 3 from 8 to 1
-move 10 from 3 to 6
-move 1 from 1 to 6
-move 5 from 1 to 7
-move 3 from 2 to 8
-move 7 from 8 to 6
-move 7 from 8 to 6
-move 1 from 3 to 5
-move 5 from 7 to 9
-move 4 from 8 to 4
-move 3 from 2 to 8
-move 1 from 7 to 8
-move 3 from 3 to 9
-move 3 from 7 to 4
-move 1 from 7 to 2
-move 9 from 9 to 1
-move 5 from 1 to 9
-move 4 from 8 to 6
-move 1 from 2 to 7
-move 1 from 5 to 3
-move 1 from 3 to 7
-move 1 from 1 to 9
-move 1 from 1 to 7
-move 5 from 9 to 6
-move 2 from 7 to 6
-move 10 from 4 to 8
-move 1 from 4 to 2
-move 1 from 4 to 1
-move 1 from 9 to 2
-move 3 from 1 to 2
-move 1 from 7 to 3
-move 1 from 2 to 1
-move 16 from 6 to 3
-move 9 from 6 to 1
-move 6 from 6 to 1
-move 5 from 6 to 1
-move 3 from 8 to 1
-move 11 from 3 to 4
-move 1 from 6 to 2
-move 3 from 8 to 2
-move 4 from 1 to 6
-move 5 from 3 to 2
-move 1 from 2 to 5
-move 1 from 8 to 5
-move 5 from 8 to 3
-move 4 from 6 to 9
-move 2 from 9 to 6
-move 3 from 3 to 9
-move 1 from 5 to 7
-move 5 from 1 to 6
-move 3 from 6 to 4
-move 2 from 2 to 9
-move 8 from 4 to 2
-move 9 from 1 to 7
-move 3 from 3 to 5
-move 3 from 5 to 7
-move 12 from 7 to 1
-move 5 from 4 to 6
-move 1 from 4 to 5
-move 7 from 1 to 8
-move 5 from 9 to 3
-move 1 from 7 to 4
-move 10 from 1 to 8
-move 1 from 4 to 8
-move 4 from 6 to 8
-move 1 from 6 to 9
-move 2 from 5 to 1
-move 4 from 3 to 4
-move 1 from 1 to 8
-move 4 from 4 to 7
-move 2 from 1 to 8
-move 4 from 6 to 1
-move 3 from 9 to 5
-move 1 from 6 to 5
-move 1 from 3 to 7
-move 24 from 8 to 6
-move 3 from 6 to 5
-move 4 from 6 to 7
-move 1 from 1 to 7
-move 7 from 7 to 6
-move 7 from 5 to 3
-move 13 from 6 to 8
-move 3 from 1 to 2
-move 7 from 6 to 3
-move 12 from 2 to 4
-move 4 from 6 to 9
-move 6 from 3 to 1
-move 1 from 2 to 4
-move 2 from 8 to 7
-move 2 from 2 to 9
-move 6 from 3 to 4
-move 12 from 8 to 2
-move 18 from 2 to 5
-move 10 from 4 to 3
-move 4 from 7 to 3
-move 5 from 4 to 7
-move 3 from 5 to 2
-move 4 from 7 to 9
-move 1 from 5 to 4
-move 3 from 2 to 1
-move 4 from 3 to 6
-move 7 from 5 to 6
-move 2 from 5 to 7
-move 5 from 1 to 7
-move 9 from 7 to 6
-move 8 from 9 to 8
-move 1 from 1 to 3
-move 1 from 3 to 1
-move 10 from 3 to 9
-move 8 from 8 to 4
-move 1 from 3 to 8
-move 1 from 1 to 3
-move 6 from 9 to 1
-move 5 from 5 to 3
-move 5 from 3 to 6
-move 1 from 8 to 9
-move 19 from 6 to 2
-move 13 from 4 to 1
-move 4 from 1 to 5
-move 6 from 2 to 1
-move 2 from 9 to 4
-move 1 from 3 to 1
-move 9 from 2 to 3
-move 4 from 5 to 1
-move 5 from 9 to 6
-move 4 from 3 to 4
-move 3 from 2 to 7
-move 2 from 4 to 8
-move 6 from 1 to 9
-move 1 from 8 to 6
-move 4 from 1 to 5
-move 3 from 4 to 5
-move 1 from 7 to 2
-move 11 from 1 to 6
-move 1 from 2 to 7
-move 5 from 3 to 7
-move 1 from 3 to 4
-move 1 from 4 to 8
-move 3 from 5 to 6
-move 8 from 1 to 7
-move 1 from 8 to 9
-move 1 from 6 to 9
-move 1 from 8 to 5
-move 11 from 6 to 5
-move 12 from 5 to 2
-move 1 from 5 to 2
-move 8 from 7 to 3
-move 1 from 5 to 6
-move 2 from 5 to 6
-move 3 from 7 to 1
-move 6 from 2 to 6
-move 1 from 3 to 1
-move 1 from 4 to 1
-move 4 from 6 to 2
-move 5 from 1 to 5
-move 10 from 2 to 3
-move 2 from 9 to 4
-move 4 from 5 to 8
-move 2 from 2 to 7
-move 12 from 6 to 7
-move 1 from 8 to 2
-move 10 from 3 to 4
-move 2 from 3 to 5
-move 1 from 3 to 1
diff --git a/input/day6.txt b/input/day6.txt
deleted file mode 100644
index 0365fef..0000000
--- a/input/day6.txt
+++ /dev/null
@@ -1 +0,0 @@
-jfnjjwbbqttplpvllqgllmdllfmllscssqmqzmmwzznqnwqnwnqnjjbdbpbtbdbzzzljljzjjpccrmmppzfpzfpfnfccfbbcqcrcffblfbftbfbtbwwwmgwmgmnngnllnfllhghcghhjppchcfcnfffllmmqbmmpwwwwlqwwqgqcqsqjqpqzqqdzdtztltslsljjfqfcqqgbqqqghqgqvgvrggqwggrgjgmmnrmmzgmzgzpzjjctcmtcmcnndppcvpvrrwvrvhrvhrhjhnjnvjnjrjggccvffnqqvfqvvnmvmqmfmfqqzfzbfzzzgpzpllrwwnpwpnwnwgwhhrrdnrrdjjzjszsjjbddcdbbvmbmqbqnbqbsqbsqqwbwhwggssdnnmttvnnvmnmhmfhhjchcttzdzdqqszzcwwhhwzhwhphqhcqqsggddfmmvzmzwmwfwzwrrbmrrnwnfnwnlwnwrwfwnnmtnnzwnwdnnbhhrphrhlhwllpmmbcbtbffmqffddjnjwwzpzfpptbbqqwbwzbzjbjmjljblbtlblqqhqbqggrngrgllbmbccmhmqmqwwqcqssqzzfjzjrjnnqrqssfnsnvvtgvvmsvsqqljjbsbrrjllvfvzfzmzhzzhthjhshlslfljfjqjpqpvvmpmhpmhmqqmmdwmddppjlplhlsstlssgnggrbblggffcdfdzzwqqtztqtwqtwtzzsjsbszsbsvbvwwjqjnnpdpccwssvdsdzzqbqbtbtqtmtltltvlvddzwzzfpzpjpgphprpgpqqwppdwpdplddvffcdffvpvqqgvqgvvrfvrvqrrcjcpjjpttftqqvjqvqsvqsvqssdpdbbbmcmscsddbhhgttwhhjlltqllnqntqtsscnntwwhswswlwggldltlttsjszsnznsznzccbtbblplnnmfmqmrrvjvhjhzhnzzgnnhrrdrllblpbllfdfjjssvnssvlsllnqqhwqhhhsgstsjstthrrhrghrhhfmhmwhwrwwsrwrfwwdnntqnnsvnvmnnfvnntztqzqhqnqjnnjfflbfllrsllqhqdqccgvgnvvcwcfccmssqnqhhqrrfrtrvvnjnpjnjjpplmlppvmpphjhppvhvdvssjcjrrtrdrrsvvbbjzzrtztgzghzhccwmccshhzbhhdwdwsdswwlcwllpblpphrppfhfnffrbbcgcmggnvnzzmvvcrrftrftrffcscvcsslbljlglzgzbzczszmsmbmnbbhdhvvsqvqhvvfrfddbpwgvztwwqcpzhhwnhphnrwldjmztsptbbgsqbqqccwbdqzvhfjlfldgphzbfprclgpfztbrgvsvfpghmdchscbdqjqgzvmrtdrfzbhgdvgznjcsmglcfwhdtpsljnvvzjcbbrczwtgpdmgpzhctvbbmvsjzthffsjqhfsdrclpqslbhnmpczwvggpzbjcchfjzjhhgtrmlgnzlndfvzrccgggrpmprbmjbfjjhzrhrtwgqdbgdlqghssrnmtmpvttcqwnwdzhgfnddgbqcsdvzvwqdnmmpwrwhfbqtcpqhvwbczrmjqzsntvdrncwjsmvvwcngrtlwtjmnctwrrtvphbjhlqmgzfsfsrblzzvmzlbhzjhwbdfpncdrfchmrqhspdszcjrnvwtmjzmsmzcdphsdzjgqswwrpdvlpvrdnhplnlmswvcrzlcmbtqtscjfwrnrctrvdqcqzwcvgvpdgrndrgsrvzftwpqjjgjhzwhvrjlqntdtcjdrqzhqlqqdffcgvttlhvwgggnwmdlvghfgjpsmntbvbjbbttrwsljwsrvtmznvqdptpwtdcwtcsfdjlmdqthqggjcptrqhbsbjzqqmvvjmgmppqmjmnjdqvspzlbgzjsjshpslmszqnzghsszpsmpzfcrqqjdwvtbnzstvvjzvtzgpptcmvmbvmpvpzvgfnwtlmdzhvhshtwvnbgwmtzqhcptflpqsqvmptchpfcbwhvjzdcnsnqrgdwfcthqfssnbqnvgvvhlzqfqmdlcwnshtvhhhpghjbmhdbfbqcvbnbvwbzcbbmjnrqmsdqnmnbsrvhggzsrlbwtfmgwrnlhrbrrrqdcspnrpnppngrtdqtbmbhcbjrlhpfjpdnfndmqvwvhlgmsntpwrlrwwqhwvzbpzqqggnbqlsjjqtbqjcdpmndgmtdhfbqrpdzzsnmhzmqqnbdqftqmnhfbdzdlfwgjsjhrcsmtfzgwbvbbzdrlbmcgmppqfppmbqrnsmrmhrdsvgcfmzpfnvrbbgfccfcbphszwdbnnwcjjvvlpdtfzgtslvgqwmsvlpzjcbqwqclrjrsgthhtqrqrhvsdfjntgllsvslrvdtnsdmrgtqcmswnqwlrwlfmcfftbjpvdnmczqzldsssszhjtqtqvqtwhjcqchjvqvntvzzzprbmjcctsqfdcvpbtsgnnsqtqnmjhrgqcjnzrdsgrbtdpqjbgcmnfwhnsrfwcdmncjzwcngfbmmrsbvgvvqpvrdjfsqwjdmqjdpzcbjjfmzjjgbnwqgrvpmbzdhsgtldrzvglscfwbmjltcrzrgdslgprwscwbrhtdtglznjdcvfjzjjqzntdqdbcrcbbmvnzdshjzcsfsgpghmgdqdwsnwjtvtbqbqccbcwjpnhdhzcvdssvnvqtvzwprhpgftdwwvgsbnlzzjppcrrwmrsthvjjrvrsdrbdqfgsjsmwfplpstrbnpdhhcblhjfwzngmhlwbvnfcbgwshspsbbgbldrvmcnczszpgnddrfwrtgcqjggrrcbjwrdjlrvtspbftrtjbzjwchpfnjctcjtwtpmtblczcftqlphdjczfrvtzlsglpvhqsqqblttdjrlczhrqsgpggmvnhpqtrfbpgvzftwtsmwhwswtpvtwnsshmlcffpcjshqhqqsjtpbgszscmcbnhjjtjmpgfdhgmljqmmwlfptstjjvqhcbjpjpwzwqflhslclzzjlmcttbsncqmfzhgnzwbdtnvfwbtztwbhtfsqjfzwmfflmbwnqzqhcjwdpbvngsgzlwvwcqhqjsndznbbdcqqhmjjpqjbsnvwztgmqwdcbbjvcndmhsbvbjnzlbscmgnjcrrwrfdljtcsgmwtffgcjflpzzdcnzvmrbnrjbbmhzqqjtgsrwqmmrhpndwlbnrtrhhpqlmdrcrtdmzsslrmffpftdjvfcpvvhzhjhqtrrsclvtbsccgmmqrjbqgbmpnbzlsncssdhmjppjptvddfgbbnjzjjldjlqjzhhttsclrmsgzctwjqqvtjlfzwgtffgrdjzwdcnrprlcswffghngrqcgsbzqhhvbfjtwcjlrrmbtqjdrgpnbftnmzqnndnqwgrqndlwmjnnspbhjlnzrnptnrmcjhpbfcqpvbchvdwthjlcrfpssgtfbsgfrftcrwttrspbsvzpvcczmdqslcdgfljvtjsdpjnwmdvfzfllrdrbgvpltzlqcrlwbncswhfvrdthspmhfhfdlvpbcqlmjfznhnqblffftgzqrtswnmtnvjprqqhhhvrscvbbzgmnlnprghfdjqbgjppjzjrnclfdssbmgspwcscnlcrrqmtlljrmcwgdgcqwvvjzvsjdjvsspszlcthwzrwqtzdgmqvnlvvzrvrpqqwswzcchncrpnjdmflvmhhwvrrstpvnszfrmvpdtpqpbdmwvvbbpjnwmtststtlcvqdnvqqphzlhhzbbbjssgdcnhlmwrzwvwmcmgrcngqzcnffqzfnvldpdjmsspgpbrzhnszfnljfcrgsjvqjjbstvghlcslhqlzhltpglwffrzfgjghssfgrptbnpbhqnhhfbjsnmsvltqpthdmzzrhrhhmzlplvrtdqfrfrppdpqnllblcfjqpdwznsbrhcncdpmztcrjrfnlwtznrmpbzqsbrqrbnthgfpshrdhnwjmrnsmsfqwdjsmsvhfrbdpjrwcvmdvvmdtfqjgmdsrqtctsdmznngbsrfjvhllgwt
diff --git a/input/day7.txt b/input/day7.txt
deleted file mode 100644
index b9cccb9..0000000
--- a/input/day7.txt
+++ /dev/null
@@ -1,1101 +0,0 @@
-$ cd /
-$ ls
-dir grdd
-270251 hjlvwtph.jzv
-230026 jzmgcj.gmd
-dir nns
-dir rrfflbql
-$ cd grdd
-$ ls
-233044 mqbz.fcp
-dir nnch
-82939 rgtvsqsh.psq
-150253 srvg.dth
-$ cd nnch
-$ ls
-4014 mqbz.fcp
-$ cd ..
-$ cd ..
-$ cd nns
-$ ls
-dir cgbdghtd
-dir dnh
-dir gjhp
-dir jwjm
-dir mrpfzd
-dir ncvv
-dir pfnglqgw
-dir tlh
-dir vnrhpc
-$ cd cgbdghtd
-$ ls
-276941 jrrcdgz.szm
-$ cd ..
-$ cd dnh
-$ ls
-269539 nnch
-220637 sjzmpwwb
-$ cd ..
-$ cd gjhp
-$ ls
-dir czclvmwc
-dir jgtzfsm
-$ cd czclvmwc
-$ ls
-179729 fzqvvlg
-67916 pmsdthr.prv
-$ cd ..
-$ cd jgtzfsm
-$ ls
-151591 rcggj.nwm
-$ cd ..
-$ cd ..
-$ cd jwjm
-$ ls
-203559 nnch
-$ cd ..
-$ cd mrpfzd
-$ ls
-dir pfnglqgw
-204978 qscs.vpq
-16184 tbfwpmp.hvl
-$ cd pfnglqgw
-$ ls
-dir wvzw
-dir ztl
-$ cd wvzw
-$ ls
-195912 jpn.ndh
-143238 nnch.djz
-2239 pmsdthr.prv
-dir sfqq
-$ cd sfqq
-$ ls
-134913 pthmqd
-dir vcdhz
-$ cd vcdhz
-$ ls
-13800 ffhv.jnq
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd ztl
-$ ls
-181007 mqbz.fcp
-266517 zbpjz.gbr
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd ncvv
-$ ls
-296494 ccmvjm.bjb
-20801 hjr
-32494 mqbz.fcp
-dir nnch
-dir pfnglqgw
-dir qpq
-dir rftzzmq
-dir wgblcl
-294511 wrdmgdb.fmh
-$ cd nnch
-$ ls
-dir hjzpfvm
-dir ncvv
-dir pffr
-dir pfnglqgw
-dir ssdffgsq
-$ cd hjzpfvm
-$ ls
-304078 mqbz.fcp
-dir nnch
-146425 nnch.lrw
-dir vcfglm
-dir zhscvh
-$ cd nnch
-$ ls
-311625 gqmpvplj.vjg
-248744 ndfcj
-$ cd ..
-$ cd vcfglm
-$ ls
-dir btptvs
-dir ghpvzvzp
-146354 nnch
-$ cd btptvs
-$ ls
-127157 nqnnwq.rtz
-16115 pmsdthr.prv
-$ cd ..
-$ cd ghpvzvzp
-$ ls
-dir ncvv
-$ cd ncvv
-$ ls
-236869 pmsdthr.prv
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd zhscvh
-$ ls
-225337 glpz
-$ cd ..
-$ cd ..
-$ cd ncvv
-$ ls
-dir nljtcssr
-dir svjhsvjh
-$ cd nljtcssr
-$ ls
-258085 gqmpvplj.vjg
-dir ncvv
-dir qmzfgcr
-249049 wznr.gbs
-dir zvvpqlmq
-$ cd ncvv
-$ ls
-147686 ndfcj.sfr
-$ cd ..
-$ cd qmzfgcr
-$ ls
-162245 ndfcj.nlj
-$ cd ..
-$ cd zvvpqlmq
-$ ls
-160481 ggnc
-$ cd ..
-$ cd ..
-$ cd svjhsvjh
-$ ls
-dir bjqbmt
-58138 gqmpvplj.vjg
-dir nsvf
-154398 rrhjs.gch
-dir wmvhmlr
-$ cd bjqbmt
-$ ls
-252614 ndfcj.wzg
-153886 nnch
-214625 zhmdvb
-$ cd ..
-$ cd nsvf
-$ ls
-274932 nnch.jfg
-$ cd ..
-$ cd wmvhmlr
-$ ls
-137205 nnch
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd pffr
-$ ls
-89895 cwpnzngf.swg
-197833 jgv
-184768 jjhzddp.fbb
-31033 tpngfdsg.brv
-$ cd ..
-$ cd pfnglqgw
-$ ls
-228015 ccmvjm.bjb
-$ cd ..
-$ cd ssdffgsq
-$ ls
-165887 gqmpvplj.vjg
-dir lfq
-dir nnch
-170828 qjb.mnp
-dir ttj
-$ cd lfq
-$ ls
-257411 gqmpvplj.vjg
-137375 jzmgcj.gmd
-267329 nsbsgd.zvq
-$ cd ..
-$ cd nnch
-$ ls
-dir mrfwfq
-171186 ndhqthf.jlp
-$ cd mrfwfq
-$ ls
-100447 lsfsh.mvr
-$ cd ..
-$ cd ..
-$ cd ttj
-$ ls
-49634 ndfcj
-dir tqvld
-$ cd tqvld
-$ ls
-dir ndfcj
-$ cd ndfcj
-$ ls
-dir gnzj
-80690 pmlnbvj
-12843 zbrfmfgj.lzr
-$ cd gnzj
-$ ls
-dir wtpzrpn
-$ cd wtpzrpn
-$ ls
-33840 gqmpvplj.vjg
-18122 rrfflbql.vws
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd pfnglqgw
-$ ls
-289092 fdjfvb
-$ cd ..
-$ cd qpq
-$ ls
-126281 ccmvjm.bjb
-dir crtzrd
-231988 jzmgcj.gmd
-203061 mgmmp
-272098 mqbz.fcp
-dir pfnglqgw
-dir qzvcsn
-105003 rrfflbql.mcm
-$ cd crtzrd
-$ ls
-162336 fsps
-100215 mctd.wsz
-67983 mqbz.fcp
-281538 mqq.cgz
-dir ndfcj
-dir rrfflbql
-dir wbmtvr
-$ cd ndfcj
-$ ls
-290647 pfjczr.wjc
-$ cd ..
-$ cd rrfflbql
-$ ls
-dir mpr
-dir ncvv
-dir rrfflbql
-301818 zml.qfj
-$ cd mpr
-$ ls
-237300 gqmpvplj.vjg
-dir pfnglqgw
-$ cd pfnglqgw
-$ ls
-dir brnwdjtg
-dir dvqlmzw
-248787 pmsdthr.prv
-$ cd brnwdjtg
-$ ls
-256129 ncvv
-dir ptztp
-$ cd ptztp
-$ ls
-104775 nnch.wlc
-$ cd ..
-$ cd ..
-$ cd dvqlmzw
-$ ls
-25407 twgqbrtl
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd ncvv
-$ ls
-dir jvwvsm
-62293 jzmgcj.gmd
-261836 mqbz.fcp
-dir vvvrf
-$ cd jvwvsm
-$ ls
-222978 ccmvjm.bjb
-207799 jzmgcj.gmd
-dir pcvsvcn
-248569 pmsdthr.prv
-dir wmd
-$ cd pcvsvcn
-$ ls
-39803 pmsdthr.prv
-$ cd ..
-$ cd wmd
-$ ls
-9516 rfstbvj.nhz
-$ cd ..
-$ cd ..
-$ cd vvvrf
-$ ls
-dir ncvv
-dir znwc
-$ cd ncvv
-$ ls
-110667 jzmgcj.gmd
-$ cd ..
-$ cd znwc
-$ ls
-182248 ndfcj.crv
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd rrfflbql
-$ ls
-231013 ccmvjm.bjb
-dir jlc
-dir rrfflbql
-79210 ttm.zmw
-$ cd jlc
-$ ls
-28096 ccmvjm.bjb
-113156 pmsdthr.prv
-$ cd ..
-$ cd rrfflbql
-$ ls
-234558 lbg.bpn
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd wbmtvr
-$ ls
-285832 fqhs
-$ cd ..
-$ cd ..
-$ cd pfnglqgw
-$ ls
-110965 nnch
-195414 pmsdthr.prv
-243812 thcpw.jfw
-$ cd ..
-$ cd qzvcsn
-$ ls
-279179 gqmpvplj.vjg
-191705 mhmlfc.czv
-146298 pfnglqgw.ppm
-2775 pmsdthr.prv
-$ cd ..
-$ cd ..
-$ cd rftzzmq
-$ ls
-310418 bddhlvs.rwm
-152681 cdznrjl
-278447 rrfflbql
-dir tmcltf
-$ cd tmcltf
-$ ls
-dir mzr
-$ cd mzr
-$ ls
-24154 ccmvjm.bjb
-dir nnch
-dir rqsbw
-$ cd nnch
-$ ls
-100523 mqbz.fcp
-$ cd ..
-$ cd rqsbw
-$ ls
-64033 czzqg.pcz
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd wgblcl
-$ ls
-235768 dvdzbgv.vwl
-186757 jzmgcj.gmd
-$ cd ..
-$ cd ..
-$ cd pfnglqgw
-$ ls
-129407 zfphqcsf.cfn
-$ cd ..
-$ cd tlh
-$ ls
-89310 jzmgcj.gmd
-21486 nwnbbmr.lsq
-40023 rdmtp.zsf
-$ cd ..
-$ cd vnrhpc
-$ ls
-104731 gqmpvplj.vjg
-176015 grn
-3646 jzmgcj.gmd
-dir ncvv
-45414 nfrj.lvq
-233767 pfnglqgw.bvf
-$ cd ncvv
-$ ls
-252691 ccmvjm.bjb
-dir ncvv
-dir vwv
-dir wwmwfbf
-$ cd ncvv
-$ ls
-306441 qfhhnmqz.snc
-$ cd ..
-$ cd vwv
-$ ls
-56033 rrfflbql
-$ cd ..
-$ cd wwmwfbf
-$ ls
-45964 gqmpvplj.vjg
-118391 mvwl
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd rrfflbql
-$ ls
-175540 bcw.sqp
-154750 ggncvs.nvn
-dir jqzm
-dir mgbglnr
-192820 ndfcj
-dir pfnglqgw
-217147 qjng.svz
-dir rrfflbql
-$ cd jqzm
-$ ls
-dir ncvv
-dir nfcvcddz
-242934 rjwlgm
-dir wzj
-$ cd ncvv
-$ ls
-298067 pfnglqgw.jdv
-$ cd ..
-$ cd nfcvcddz
-$ ls
-261264 gqmpvplj.vjg
-19464 mqbz.fcp
-121507 ncqhrf
-dir ndfcj
-58485 ndfcj.vhh
-dir rcrzjm
-228359 wnftnshq
-$ cd ndfcj
-$ ls
-309008 bwn
-$ cd ..
-$ cd rcrzjm
-$ ls
-48178 fgzpwhvt
-129342 qns.lnj
-$ cd ..
-$ cd ..
-$ cd wzj
-$ ls
-91384 gqmpvplj.vjg
-dir nnch
-dir rzm
-$ cd nnch
-$ ls
-dir sgbwrl
-$ cd sgbwrl
-$ ls
-dir ndfcj
-$ cd ndfcj
-$ ls
-295624 cbmdr
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd rzm
-$ ls
-dir cprj
-86746 dfwsj.hqq
-dir dljnvq
-dir ndfcj
-159465 nsglq
-202670 pfnglqgw.wbh
-29700 rrfflbql.wln
-dir vgtftq
-$ cd cprj
-$ ls
-148192 gqmpvplj.vjg
-165473 hwp.ltc
-$ cd ..
-$ cd dljnvq
-$ ls
-91675 pmsdthr.prv
-$ cd ..
-$ cd ndfcj
-$ ls
-83124 rrfflbql.ghs
-$ cd ..
-$ cd vgtftq
-$ ls
-186744 mqbz.fcp
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd mgbglnr
-$ ls
-dir ddtcz
-dir ncvv
-dir nhpwf
-dir rrfflbql
-203683 ttbc
-dir tvbjgv
-dir wvzcq
-$ cd ddtcz
-$ ls
-61553 wfzj
-$ cd ..
-$ cd ncvv
-$ ls
-37589 ccmvjm.bjb
-87987 dnct
-196537 ndfcj.cqg
-40448 pmsdthr.prv
-$ cd ..
-$ cd nhpwf
-$ ls
-243345 gqmpvplj.vjg
-53165 nnch.gfc
-dir pfnglqgw
-dir vdnnf
-$ cd pfnglqgw
-$ ls
-131411 mhvzv.scz
-142119 nnch.gnt
-$ cd ..
-$ cd vdnnf
-$ ls
-83904 ccmvjm.bjb
-dir czfqdtd
-dir dgblftbz
-dir jnftbbtm
-dir pfbnl
-dir pfnglqgw
-$ cd czfqdtd
-$ ls
-dir nnch
-$ cd nnch
-$ ls
-255744 ndfcj.ldv
-$ cd ..
-$ cd ..
-$ cd dgblftbz
-$ ls
-278883 ncvv.zph
-dir pfnglqgw
-133315 phns.cmq
-130316 sftj
-$ cd pfnglqgw
-$ ls
-174155 vnwtv
-$ cd ..
-$ cd ..
-$ cd jnftbbtm
-$ ls
-255828 nmln
-30605 pfnglqgw
-$ cd ..
-$ cd pfbnl
-$ ls
-8603 ndfcj
-$ cd ..
-$ cd pfnglqgw
-$ ls
-235364 pmsdthr.prv
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd rrfflbql
-$ ls
-dir gfgbj
-$ cd gfgbj
-$ ls
-215226 jzmgcj.gmd
-$ cd ..
-$ cd ..
-$ cd tvbjgv
-$ ls
-dir nnch
-$ cd nnch
-$ ls
-dir gmsb
-$ cd gmsb
-$ ls
-dir tlqdvpr
-$ cd tlqdvpr
-$ ls
-130013 hzrq.zrg
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd wvzcq
-$ ls
-dir ncvv
-$ cd ncvv
-$ ls
-103168 ccmvjm.bjb
-18537 ncvv
-dir nnch
-dir rrfflbql
-$ cd nnch
-$ ls
-20928 ndfcj.lln
-$ cd ..
-$ cd rrfflbql
-$ ls
-dir lgfwf
-$ cd lgfwf
-$ ls
-dir fmzqt
-dir rrfflbql
-$ cd fmzqt
-$ ls
-301419 gqmpvplj.vjg
-$ cd ..
-$ cd rrfflbql
-$ ls
-dir nbvqch
-$ cd nbvqch
-$ ls
-298966 csqvdql.cwr
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd pfnglqgw
-$ ls
-dir bhmndjpq
-203077 fssbcjcm.hvt
-dir lfslp
-dir ncvv
-dir nftdcrl
-dir nnch
-dir pfnglqgw
-dir qfbbnr
-dir wttc
-$ cd bhmndjpq
-$ ls
-299744 cmgwwccb.tvv
-173562 fpwv
-dir hmnbfdtr
-dir jqpcs
-73425 mqbz.fcp
-dir ncvv
-dir ndfcj
-95707 pmsdthr.prv
-dir ptzdv
-dir qzhrsnqh
-dir sbqg
-$ cd hmnbfdtr
-$ ls
-dir pfnglqgw
-dir qmpplbtv
-77228 tvpdstcn.zbb
-$ cd pfnglqgw
-$ ls
-dir dwr
-dir jmgp
-102634 mqbz.fcp
-148654 ncvv
-257637 ncvv.nzn
-286938 rrfflbql
-$ cd dwr
-$ ls
-141669 ndfcj
-9012 ptrlq.stq
-$ cd ..
-$ cd jmgp
-$ ls
-78473 pfnglqgw
-$ cd ..
-$ cd ..
-$ cd qmpplbtv
-$ ls
-202948 wjp.rgt
-$ cd ..
-$ cd ..
-$ cd jqpcs
-$ ls
-290654 fmmcph
-8123 zrr.vqm
-$ cd ..
-$ cd ncvv
-$ ls
-dir hbrttp
-$ cd hbrttp
-$ ls
-128004 nffzj
-$ cd ..
-$ cd ..
-$ cd ndfcj
-$ ls
-dir vscwfsl
-$ cd vscwfsl
-$ ls
-251706 snww.dzb
-$ cd ..
-$ cd ..
-$ cd ptzdv
-$ ls
-113702 nnch
-$ cd ..
-$ cd qzhrsnqh
-$ ls
-118758 gqmpvplj.vjg
-75504 vcnn.stz
-102737 zvv
-$ cd ..
-$ cd sbqg
-$ ls
-287663 bhcpslm.wwt
-dir bqr
-dir czhfphh
-39170 fqn
-dir gqnts
-267314 hlv.ljc
-8701 jqpdpg.prz
-dir ncvv
-211749 psln.pdq
-$ cd bqr
-$ ls
-dir chjfw
-dir dgccfvtl
-219440 fvfsfz
-262276 jzmgcj.gmd
-dir ndfcj
-294287 pfnglqgw.lwh
-163881 rrfflbql
-278231 vgjm.rrh
-$ cd chjfw
-$ ls
-134800 hvmvqbz.bqj
-$ cd ..
-$ cd dgccfvtl
-$ ls
-155579 lwmqrd.wvp
-$ cd ..
-$ cd ndfcj
-$ ls
-144255 ncvv.hrn
-236730 ndfcj
-dir pfz
-$ cd pfz
-$ ls
-297448 rrfflbql.fdt
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd czhfphh
-$ ls
-dir wmws
-$ cd wmws
-$ ls
-14499 ncvv
-$ cd ..
-$ cd ..
-$ cd gqnts
-$ ls
-165940 ccmvjm.bjb
-dir gjcm
-dir hldzdlrl
-dir jtnpgg
-dir nnch
-287896 pmsdthr.prv
-$ cd gjcm
-$ ls
-125716 gqmpvplj.vjg
-dir mhjm
-197155 msspbg
-176407 trtdggnf
-$ cd mhjm
-$ ls
-18749 jzmgcj.gmd
-252999 nnch
-76392 rrfflbql.mzh
-$ cd ..
-$ cd ..
-$ cd hldzdlrl
-$ ls
-dir gzpcgj
-dir rvvgn
-$ cd gzpcgj
-$ ls
-dir vfz
-$ cd vfz
-$ ls
-183852 pmsdthr.prv
-$ cd ..
-$ cd ..
-$ cd rvvgn
-$ ls
-143443 ndfcj
-$ cd ..
-$ cd ..
-$ cd jtnpgg
-$ ls
-dir dhvd
-dir hlmgslbs
-dir rrfflbql
-dir vmqpcm
-$ cd dhvd
-$ ls
-131598 ltr.rph
-$ cd ..
-$ cd hlmgslbs
-$ ls
-173562 rrfflbql
-$ cd ..
-$ cd rrfflbql
-$ ls
-dir ghvmc
-$ cd ghvmc
-$ ls
-311611 jzmgcj.gmd
-$ cd ..
-$ cd ..
-$ cd vmqpcm
-$ ls
-192032 mqbz.fcp
-$ cd ..
-$ cd ..
-$ cd nnch
-$ ls
-112995 ccmvjm.bjb
-$ cd ..
-$ cd ..
-$ cd ncvv
-$ ls
-106711 dswpw.wgr
-46614 jzmgcj.gmd
-115391 mqbz.fcp
-dir nnch
-61970 pmsdthr.prv
-dir rrfflbql
-$ cd nnch
-$ ls
-50060 gqjtv.gcs
-dir lnmmd
-73078 ncvv
-49129 tfb
-dir vgwpcjrl
-dir wnqlrqlf
-$ cd lnmmd
-$ ls
-71780 gqmpvplj.vjg
-$ cd ..
-$ cd vgwpcjrl
-$ ls
-8269 zcspgw
-$ cd ..
-$ cd wnqlrqlf
-$ ls
-dir wzsvhssb
-$ cd wzsvhssb
-$ ls
-187249 jzmgcj.gmd
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd rrfflbql
-$ ls
-dir bpzmvds
-24889 hfnbzcn
-dir lqffwfr
-274793 nnch.svh
-dir rhwm
-$ cd bpzmvds
-$ ls
-298048 tfnqwpj
-$ cd ..
-$ cd lqffwfr
-$ ls
-dir mzfpbjtl
-$ cd mzfpbjtl
-$ ls
-217469 jzmgcj.gmd
-$ cd ..
-$ cd ..
-$ cd rhwm
-$ ls
-54198 gqmpvplj.vjg
-dir tlnmwhdt
-$ cd tlnmwhdt
-$ ls
-94380 ndfcj.bvv
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd lfslp
-$ ls
-dir cmrwvp
-dir cnh
-311549 jgmf.fbs
-dir jtgrbqvj
-166298 pbwsqpcg.whf
-151437 pfnglqgw.mcj
-dir sqlwn
-$ cd cmrwvp
-$ ls
-217666 pmsdthr.prv
-172469 vzw.rqw
-$ cd ..
-$ cd cnh
-$ ls
-84011 jfb.mpt
-$ cd ..
-$ cd jtgrbqvj
-$ ls
-dir dcfpfq
-dir ghhs
-dir ntbmh
-dir pfnglqgw
-$ cd dcfpfq
-$ ls
-159731 pfnglqgw
-$ cd ..
-$ cd ghhs
-$ ls
-104713 blwnhcn
-$ cd ..
-$ cd ntbmh
-$ ls
-174007 jzmgcj.gmd
-dir pfnglqgw
-60549 rrfflbql.scj
-dir zwcdggd
-$ cd pfnglqgw
-$ ls
-49844 rfdw.pqh
-$ cd ..
-$ cd zwcdggd
-$ ls
-135925 ccmvjm.bjb
-1135 gqmpvplj.vjg
-120968 hmgpcj.nbb
-$ cd ..
-$ cd ..
-$ cd pfnglqgw
-$ ls
-184937 ccmvjm.bjb
-128621 llsjsmg.vtv
-dir lsbf
-42834 ndfcj.fwq
-85391 trrchml.sgp
-$ cd lsbf
-$ ls
-192593 cfdtsfq.sln
-289191 nnch.qzj
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd sqlwn
-$ ls
-77962 ccmvjm.bjb
-114288 ndfcj
-$ cd ..
-$ cd ..
-$ cd ncvv
-$ ls
-dir gsd
-$ cd gsd
-$ ls
-14949 jwcp.lmq
-$ cd ..
-$ cd ..
-$ cd nftdcrl
-$ ls
-185409 jzmgcj.gmd
-$ cd ..
-$ cd nnch
-$ ls
-280827 djftt
-dir ljt
-dir ncvv
-dir ndfcj
-33396 qvhndl.pwn
-136204 qvlc.cbr
-14063 rrfflbql.mrq
-130666 vscjncbm.sls
-$ cd ljt
-$ ls
-166514 cgrgbpvw
-55138 jzmgcj.gmd
-$ cd ..
-$ cd ncvv
-$ ls
-dir fhnw
-56003 gqtcgszl.vnf
-145831 jzmgcj.gmd
-dir mwcbd
-dir rclnhb
-$ cd fhnw
-$ ls
-28050 gqmpvplj.vjg
-$ cd ..
-$ cd mwcbd
-$ ls
-288468 ncvv
-$ cd ..
-$ cd rclnhb
-$ ls
-190004 ndjmjbp
-$ cd ..
-$ cd ..
-$ cd ndfcj
-$ ls
-287125 gqmpvplj.vjg
-dir ndfcj
-247237 nnch
-138902 pfnglqgw
-$ cd ndfcj
-$ ls
-143400 ssvsvffz
-$ cd ..
-$ cd ..
-$ cd ..
-$ cd pfnglqgw
-$ ls
-dir cwwb
-dir dtf
-97867 mqbz.fcp
-$ cd cwwb
-$ ls
-dir wtz
-$ cd wtz
-$ ls
-300949 zcq
-$ cd ..
-$ cd ..
-$ cd dtf
-$ ls
-28018 gqmpvplj.vjg
-$ cd ..
-$ cd ..
-$ cd qfbbnr
-$ ls
-dir bqmdfjp
-89207 gjfzv
-176709 pmsdthr.prv
-246390 rrfflbql.vdl
-$ cd bqmdfjp
-$ ls
-137504 cwz.jdg
-9191 ncvv
-$ cd ..
-$ cd ..
-$ cd wttc
-$ ls
-279516 ccmvjm.bjb
-115478 lwnpwdqt.jpj
-$ cd ..
-$ cd ..
-$ cd rrfflbql
-$ ls
-162371 nnch.pnm
diff --git a/input/day8.txt b/input/day8.txt
deleted file mode 100644
index 6186368..0000000
--- a/input/day8.txt
+++ /dev/null
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diff --git a/input/day9.txt b/input/day9.txt
deleted file mode 100644
index 875fe38..0000000
--- a/input/day9.txt
+++ /dev/null
@@ -1,2000 +0,0 @@
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-D 2
-R 7
-U 8
-R 8
-U 3
-D 5
-U 2
-R 3
-D 5
-R 4
-L 6
-U 3
-L 4
-D 6
-U 2
-L 2
-D 5
-U 1
-R 2
-D 7
-L 4
-R 6
-L 4
-D 5
-L 3
-R 7
-U 5
-D 3
-L 5
-D 8
-L 8
-U 7
-D 8
-R 6
-U 5
-R 2
-U 5
-D 5
-U 7
-R 3
-L 6
-D 1
-U 6
-L 3
-R 5
-U 5
-R 2
-L 4
-U 8
-D 8
-L 7
-R 1
-U 8
-L 4
-U 1
-D 1
-R 3
-D 8
-L 4
-U 7
-L 5
-D 2
-U 6
-D 1
-L 5
-R 1
-U 6
-R 1
-D 7
-U 3
-L 7
-R 9
-D 5
-L 5
-U 5
-R 7
-U 3
-L 7
-R 3
-U 3
-L 3
-U 5
-D 8
-R 4
-L 1
-U 7
-D 3
-L 7
-U 6
-D 4
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-D 6
-R 9
-L 8
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-L 4
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-L 5
-D 5
-L 6
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-R 6
-D 8
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-D 2
-L 6
-D 9
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-D 1
-U 7
-L 8
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-L 9
-R 7
-D 9
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-D 9
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-D 8
-R 4
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-D 3
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-R 7
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-U 9
-D 4
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-D 9
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-U 10
-D 2
-L 9
-R 10
-U 8
-L 2
-U 10
-R 2
-L 2
-D 10
-R 10
-U 9
-R 6
-L 9
-D 2
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-R 8
-U 9
-L 7
-R 5
-U 2
-D 8
-R 4
-D 5
-U 7
-D 2
-R 2
-U 2
-D 1
-R 1
-D 9
-L 10
-R 3
-D 5
-R 8
-U 5
-R 1
-U 3
-L 3
-U 7
-R 10
-U 4
-D 7
-U 3
-L 3
-R 6
-U 6
-D 7
-R 3
-U 2
-D 9
-R 7
-D 1
-L 3
-D 6
-L 4
-D 5
-L 3
-U 7
-R 2
-D 8
-U 1
-L 8
-R 4
-D 8
-L 2
-D 6
-L 9
-R 9
-U 1
-R 10
-L 3
-U 8
-D 9
-R 8
-D 8
-U 2
-D 8
-L 4
-U 2
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-L 4
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-R 3
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-D 5
-U 3
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-R 4
-U 7
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-U 4
-L 2
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-D 11
-L 10
-D 10
-L 11
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-D 9
-R 5
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-D 10
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-U 1
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-U 5
-R 9
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-U 7
-D 5
-R 5
-L 6
-R 8
-L 10
-R 9
-U 6
-D 9
-L 7
-U 7
-L 9
-R 5
-D 8
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-U 6
-R 11
-L 7
-D 9
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-U 8
-L 3
-U 9
-L 2
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-L 8
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-R 4
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-U 1
-R 8
-L 8
-D 2
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-D 8
-L 1
-R 11
-L 3
-R 8
-D 3
-L 10
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-D 5
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-D 4
-U 3
-L 6
-R 2
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-D 7
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-L 4
-D 7
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-D 7
-L 7
-R 9
-L 1
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-D 10
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-D 11
-U 7
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-D 11
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-R 6
-U 9
-L 5
-D 10
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-L 10
-R 1
-D 4
-R 2
-L 4
-U 5
-L 4
-D 11
-U 8
-R 12
-L 10
-D 7
-R 4
-U 9
-R 5
-D 8
-U 9
-L 3
-R 3
-L 3
-U 11
-L 3
-D 9
-U 2
-R 3
-D 2
-L 4
-U 7
-R 10
-U 2
-D 10
-U 7
-L 1
-U 10
-L 1
-D 10
-U 12
-R 5
-L 4
-R 10
-U 6
-D 2
-R 6
-U 11
-D 1
-U 2
-L 1
-D 12
-R 2
-U 3
-D 7
-U 2
-L 9
-D 7
-R 3
-U 5
-R 10
-U 7
-D 5
-L 6
-U 11
-D 11
-L 1
-D 10
-R 1
-L 5
-U 10
-L 11
-R 10
-U 2
-D 7
-U 10
-L 10
-U 11
-D 7
-R 6
-D 3
-L 11
-U 4
-R 8
-U 6
-D 2
-U 8
-R 3
-L 7
-R 5
-U 8
-D 3
-L 12
-U 12
-D 10
-U 7
-L 10
-R 8
-D 8
-U 11
-R 3
-U 10
-R 6
-D 2
-U 3
-D 12
-L 5
-U 11
-R 9
-L 4
-U 6
-R 11
-D 1
-L 6
-U 5
-D 12
-L 9
-U 6
-L 13
-D 7
-L 10
-U 13
-L 11
-U 6
-D 11
-U 11
-L 6
-U 5
-D 2
-L 10
-D 5
-R 6
-D 13
-R 9
-D 4
-L 2
-R 11
-U 13
-L 3
-R 10
-U 2
-L 13
-U 10
-D 4
-L 2
-R 5
-L 8
-U 4
-D 1
-U 3
-D 10
-U 13
-D 2
-L 11
-R 7
-L 5
-R 7
-D 10
-R 13
-D 6
-R 11
-L 11
-R 9
-L 11
-D 13
-U 3
-L 6
-U 7
-L 12
-D 1
-R 7
-L 7
-U 1
-D 6
-R 6
-U 11
-D 2
-L 10
-R 5
-L 6
-R 6
-U 2
-R 11
-D 10
-U 9
-L 4
-U 7
-R 3
-U 9
-R 11
-U 6
-L 5
-D 1
-U 13
-L 11
-D 1
-L 9
-R 8
-D 4
-U 4
-L 1
-R 1
-L 6
-R 11
-D 10
-R 3
-U 2
-L 3
-R 1
-U 10
-R 3
-U 2
-L 1
-D 5
-U 11
-R 11
-U 11
-L 3
-U 3
-R 3
-L 3
-U 10
-L 14
-U 14
-D 6
-L 11
-R 6
-U 8
-L 12
-R 11
-U 1
-L 9
-D 11
-U 8
-D 6
-R 2
-L 12
-R 11
-D 2
-R 3
-D 5
-L 4
-U 2
-D 12
-U 12
-L 5
-R 2
-U 13
-R 1
-L 2
-D 13
-R 8
-L 14
-U 14
-L 9
-R 10
-U 5
-D 3
-U 12
-D 13
-R 2
-D 8
-R 10
-L 6
-U 12
-D 12
-R 6
-D 12
-R 13
-L 5
-R 10
-D 10
-L 8
-R 5
-L 2
-U 6
-D 2
-U 9
-L 1
-D 8
-L 7
-D 10
-L 6
-R 1
-L 6
-D 14
-U 6
-R 10
-D 4
-R 2
-D 13
-U 9
-R 11
-U 8
-R 4
-L 6
-R 14
-L 10
-U 14
-D 12
-R 3
-D 12
-L 8
-U 13
-R 4
-L 3
-R 14
-U 11
-D 13
-L 8
-U 1
-D 2
-L 11
-R 7
-D 5
-R 11
-L 1
-D 13
-L 7
-R 4
-U 7
-D 13
-L 2
-R 8
-D 1
-R 13
-L 9
-D 4
-R 12
-D 10
-U 12
-D 7
-U 5
-L 3
-U 9
-D 12
-R 8
-D 13
-R 8
-D 5
-L 14
-U 7
-D 4
-R 14
-D 14
-R 2
-D 5
-L 2
-D 13
-U 7
-L 8
-R 10
-D 9
-U 11
-D 3
-U 3
-D 2
-L 9
-D 2
-U 10
-D 7
-L 5
-R 10
-D 15
-R 1
-U 7
-D 10
-U 14
-R 12
-L 14
-U 7
-R 5
-U 2
-L 3
-R 13
-U 12
-D 1
-L 15
-D 10
-R 6
-U 9
-R 13
-U 3
-D 13
-U 1
-R 4
-L 1
-R 8
-U 14
-L 1
-R 10
-L 12
-D 15
-R 6
-U 13
-L 2
-R 13
-D 9
-U 3
-R 4
-D 11
-U 6
-D 9
-L 12
-R 1
-D 11
-R 11
-U 11
-R 5
-D 2
-L 3
-R 12
-L 8
-R 1
-L 12
-U 9
-L 3
-U 7
-D 2
-U 9
-L 10
-D 1
-U 7
-R 9
-D 11
-L 8
-D 4
-R 2
-U 12
-D 12
-U 6
-R 5
-D 2
-R 1
-D 5
-U 6
-L 10
-D 13
-R 5
-U 12
-L 4
-U 8
-L 12
-U 13
-L 1
-D 4
-L 9
-U 3
-D 15
-U 3
-D 15
-R 1
-D 10
-U 11
-R 7
-U 3
-R 13
-D 3
-U 3
-R 9
-L 12
-D 1
-U 5
-D 1
-R 9
-D 5
-U 15
-D 9
-L 10
-R 6
-L 4
-D 6
-R 5
-U 15
-R 9
-U 16
-D 3
-R 9
-U 11
-D 16
-U 7
-L 1
-U 8
-R 12
-L 1
-R 6
-D 9
-U 11
-L 5
-D 5
-R 14
-D 1
-L 3
-R 8
-L 3
-D 8
-U 11
-R 12
-U 10
-L 3
-U 10
-L 1
-R 9
-L 8
-D 2
-R 5
-U 3
-R 2
-D 9
-R 3
-D 12
-U 5
-D 13
-L 7
-R 15
-L 9
-U 9
-D 7
-R 6
-D 9
-L 7
-R 11
-L 10
-R 9
-U 13
-L 11
-U 10
-L 2
-D 13
-L 13
-R 15
-D 6
-R 15
-U 10
-R 12
-D 8
-U 16
-L 6
-R 9
-U 12
-D 4
-R 6
-U 7
-L 11
-U 12
-L 5
-R 11
-L 16
-R 3
-U 5
-L 14
-R 12
-L 13
-D 1
-L 9
-D 8
-L 6
-R 6
-D 15
-L 14
-R 17
-U 12
-D 12
-R 15
-D 2
-L 11
-R 9
-U 1
-R 5
-U 17
-R 3
-D 16
-U 6
-D 16
-R 8
-L 10
-U 13
-L 9
-D 12
-R 1
-U 4
-R 8
-D 11
-R 15
-D 15
-L 4
-D 10
-L 6
-U 15
-L 1
-R 1
-D 16
-U 7
-R 13
-D 6
-L 14
-R 15
-U 5
-R 4
-U 7
-R 6
-U 17
-L 12
-U 6
-L 5
-R 16
-L 10
-D 6
-R 7
-U 15
-R 3
-U 3
-D 16
-L 8
-R 13
-L 1
-U 2
-R 5
-D 17
-U 10
-L 16
-U 2
-L 3
-D 2
-R 10
-L 6
-R 9
-U 3
-L 5
-U 2
-D 2
-U 4
-D 10
-R 9
-U 8
-L 9
-D 16
-R 3
-U 3
-L 15
-D 11
-R 1
-U 11
-R 11
-L 12
-R 11
-D 17
-R 4
-D 14
-R 10
-U 4
-R 5
-D 12
-U 16
-D 3
-R 1
-L 15
-U 11
-R 1
-D 3
-L 9
-D 3
-L 7
-U 5
-R 12
-U 10
-R 16
-U 12
-D 9
-R 10
-U 2
-R 3
-D 15
-R 14
-L 11
-D 18
-R 12
-D 6
-U 5
-L 8
-U 7
-D 15
-R 8
-D 15
-L 7
-R 18
-L 5
-R 8
-L 10
-D 12
-R 14
-U 2
-L 7
-R 17
-U 4
-L 1
-U 10
-D 18
-L 3
-U 5
-D 12
-L 4
-R 14
-U 5
-L 18
-U 18
-D 14
-R 11
-U 6
-L 4
-R 13
-D 18
-U 18
-R 18
-U 7
-D 4
-L 17
-D 2
-U 11
-L 13
-D 13
-L 14
-U 2
-R 6
-L 3
-D 1
-L 8
-U 3
-R 5
-D 7
-L 2
-D 4
-U 1
-R 1
-U 8
-D 2
-U 3
-R 2
-D 15
-U 1
-R 9
-L 2
-R 2
-U 3
-L 16
-U 16
-R 16
-L 11
-U 9
-D 10
-R 18
-U 14
-D 7
-R 16
-D 7
-R 7
-L 3
-U 17
-R 18
-U 10
-L 15
-R 3
-U 6
-R 1
-U 1
-R 14
-D 12
-R 10
-L 7
-U 11
-D 15
-U 9
-L 11
-U 13
-D 16
-R 8
-U 5
-L 5
-U 10
-R 5
-L 15
-D 6
-L 16
-D 4
-L 19
-R 8
-U 18
-L 7
-D 15
-R 5
-U 9
-L 2
-U 17
-L 2
-U 17
-R 2
-L 13
-D 19
-L 16
-U 6
-D 13
-R 15
-D 13
-U 7
-L 7
-R 8
-D 10
-L 13
-D 4
-L 5
-U 8
-L 12
-R 13
-U 5
-R 9
-U 16
-L 5
-D 14
-L 4
-R 8
-U 4
-L 10
-R 17
-D 12
-L 14
-U 18
-D 3
-U 9
-R 12
-L 3
-R 15
-L 17
-D 4
-R 6
-L 5
-R 8
-D 19
-L 15
-D 5
-L 8
-R 7
-L 13
-D 3
-L 17
-D 12
-R 5
-L 9
-U 3
-L 17
-D 10
-R 17
-L 12
-R 16
-L 7
-D 4
-R 18
-U 10
-R 19
-L 19
-R 1
-U 10
-D 2
-L 8
-U 9
-L 15
-D 1
-R 15
-U 10
-R 18
-U 16
-R 17
-L 16
-D 9
-R 18
-U 16
-L 9
-R 14
-U 7
-L 8
-D 15
-L 7
-U 10
-D 18
-L 13
-R 1
-D 8
-R 14
-L 12
-U 2
diff --git a/src/day0.rs b/src/day0.rs
index 924db48..ab5e325 100644
--- a/src/day0.rs
+++ b/src/day0.rs
@@ -1,24 +1,9 @@
 //! Dummy challenge for testing
 
-pub fn part1(input: Vec<String>) -> String {
-    input[0].to_owned()
+pub fn part1() -> i64 {
+    123
 }
 
-pub fn part2(input: Vec<String>) -> String {
-    input[1].to_owned()
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn t_part1() {
-        assert_eq!(part1(crate::read_input(0)), "123");
-    }
-
-    #[test]
-    fn t_part2() {
-        assert_eq!(part2(crate::read_input(0)), "456");
-    }
+pub fn part2() -> i64 {
+    456
 }
diff --git a/src/day1.rs b/src/day1.rs
index b193226..c5a3824 100644
--- a/src/day1.rs
+++ b/src/day1.rs
@@ -1,6 +1,20 @@
 //! Day 1: Calorie counting
 
-fn get_elves(input: Vec<String>) -> Vec<u32> {
+use std::{
+    fs::File,
+    io::{BufRead, BufReader, Lines},
+};
+
+use path_macro::path;
+
+fn read_input() -> std::iter::Flatten<Lines<BufReader<File>>> {
+    let f = File::open(path!("input" / "day1.txt")).unwrap();
+    BufReader::new(f).lines().flatten()
+}
+
+fn get_elves() -> Vec<u32> {
+    let input = read_input();
+
     let mut elves = Vec::new();
     let mut buf = 0;
 
@@ -17,33 +31,18 @@ fn get_elves(input: Vec<String>) -> Vec<u32> {
     elves
 }
 
-pub fn part1(input: Vec<String>) -> String {
-    let elves = get_elves(input);
-    elves.iter().max().unwrap().to_string()
+pub fn part1() -> i64 {
+    let elves = get_elves();
+    *elves.iter().max().unwrap() as i64
 }
 
-pub fn part2(input: Vec<String>) -> String {
-    let mut elves = get_elves(input);
+pub fn part2() -> i64 {
+    let mut elves = get_elves();
     elves.sort();
 
     let mut acc = 0;
     for i in 1..=3 {
         acc += elves[elves.len() - i];
     }
-    acc.to_string()
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn t_part1() {
-        assert_eq!(part1(crate::read_input(1)), "69177");
-    }
-
-    #[test]
-    fn t_part2() {
-        assert_eq!(part2(crate::read_input(1)), "207456");
-    }
+    acc as i64
 }
diff --git a/src/day2.rs b/src/day2.rs
deleted file mode 100644
index 31d9672..0000000
--- a/src/day2.rs
+++ /dev/null
@@ -1,137 +0,0 @@
-//! Day 2: Rock Paper Scissors
-
-use std::cmp::Ordering;
-
-fn get_rounds(input: Vec<String>) -> Vec<(Sign, Sign)> {
-    input
-        .into_iter()
-        .filter_map(|line| {
-            line.split_once(' ')
-                .map(|(a, b)| (Sign::from_str(b), Sign::from_str(a)))
-        })
-        .collect()
-}
-
-fn get_rounds2(input: Vec<String>) -> Vec<(Sign, Ordering)> {
-    input
-        .into_iter()
-        .filter_map(|line| {
-            line.split_once(' ').map(|(a, b)| {
-                (
-                    Sign::from_str(a),
-                    match b {
-                        "X" => Ordering::Less,
-                        "Y" => Ordering::Equal,
-                        "Z" => Ordering::Greater,
-                        _ => panic!("could not parse sign `{}`", b),
-                    },
-                )
-            })
-        })
-        .collect()
-}
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-enum Sign {
-    Rock = 1,
-    Paper = 2,
-    Scissors = 3,
-}
-
-impl Sign {
-    fn from_str(s: &str) -> Self {
-        match s {
-            "A" | "X" => Self::Rock,
-            "B" | "Y" => Self::Paper,
-            "C" | "Z" => Self::Scissors,
-            _ => panic!("could not parse sign: `{}`", s),
-        }
-    }
-}
-
-fn round_result(you: Sign, opp: Sign) -> Ordering {
-    if you == opp {
-        Ordering::Equal
-    } else {
-        let won = match you {
-            Sign::Rock => opp == Sign::Scissors,
-            Sign::Paper => opp == Sign::Rock,
-            Sign::Scissors => opp == Sign::Paper,
-        };
-        if won {
-            Ordering::Greater
-        } else {
-            Ordering::Less
-        }
-    }
-}
-
-fn round_score(you: Sign, opp: Sign) -> i64 {
-    let score_shape = you as i64;
-    let score_result = match round_result(you, opp) {
-        Ordering::Less => 0,
-        Ordering::Equal => 3,
-        Ordering::Greater => 6,
-    };
-    score_shape + score_result
-}
-
-fn your_sign(opp: Sign, result: Ordering) -> Sign {
-    match result {
-        Ordering::Less => match opp {
-            Sign::Rock => Sign::Scissors,
-            Sign::Paper => Sign::Rock,
-            Sign::Scissors => Sign::Paper,
-        },
-        Ordering::Equal => opp,
-        Ordering::Greater => match opp {
-            Sign::Rock => Sign::Paper,
-            Sign::Paper => Sign::Scissors,
-            Sign::Scissors => Sign::Rock,
-        },
-    }
-}
-
-pub fn part1(input: Vec<String>) -> String {
-    let rounds = get_rounds(input);
-    rounds
-        .into_iter()
-        .map(|(you, opp)| round_score(you, opp))
-        .sum::<i64>()
-        .to_string()
-}
-
-pub fn part2(input: Vec<String>) -> String {
-    let rounds = get_rounds2(input);
-    rounds
-        .into_iter()
-        .map(|(opp, result)| round_score(your_sign(opp, result), opp))
-        .sum::<i64>()
-        .to_string()
-}
-
-#[cfg(test)]
-mod tests {
-    use rstest::rstest;
-
-    use super::*;
-
-    #[rstest]
-    #[case(Sign::Paper, Sign::Rock, 8)]
-    #[case(Sign::Rock, Sign::Paper, 1)]
-    #[case(Sign::Scissors, Sign::Scissors, 6)]
-    fn t_round_score(#[case] you: Sign, #[case] opp: Sign, #[case] expect: i64) {
-        let score = round_score(you, opp);
-        assert_eq!(score, expect);
-    }
-
-    #[test]
-    fn t_part1() {
-        assert_eq!(part1(crate::read_input(2)), "14827");
-    }
-
-    #[test]
-    fn t_part2() {
-        assert_eq!(part2(crate::read_input(2)), "13889");
-    }
-}
diff --git a/src/day3.rs b/src/day3.rs
deleted file mode 100644
index 27e47d6..0000000
--- a/src/day3.rs
+++ /dev/null
@@ -1,111 +0,0 @@
-//! Day 3: Rucksack Reorganization
-
-use itertools::Itertools;
-
-fn priority(item: char) -> i64 {
-    match item {
-        'a'..='z' => item as i64 - 'a' as i64 + 1,
-        'A'..='Z' => item as i64 - 'A' as i64 + 27,
-        _ => panic!("priority undefined for item  `{}`", item),
-    }
-}
-
-fn get_rucksack_compartments(rucksack: &str) -> [String; 2] {
-    [
-        rucksack[..rucksack.len() / 2].to_owned(),
-        rucksack[rucksack.len() / 2..].to_owned(),
-    ]
-}
-
-fn get_common_item(compartments: &[String]) -> char {
-    compartments[0]
-        .chars()
-        .find(|item| {
-            compartments[1..]
-                .iter()
-                .all(|comp| comp.chars().any(|it| &it == item))
-        })
-        .unwrap()
-}
-
-pub fn part1(input: Vec<String>) -> String {
-    input
-        .into_iter()
-        .map(|rucksack| {
-            let compartments = get_rucksack_compartments(&rucksack);
-            let common_item = get_common_item(&compartments);
-            priority(common_item)
-        })
-        .sum::<i64>()
-        .to_string()
-}
-
-pub fn part2(input: Vec<String>) -> String {
-    input
-        .into_iter()
-        .tuples::<(String, String, String)>()
-        .map(|group| {
-            let common_item = get_common_item(&[group.0, group.1, group.2]);
-            priority(common_item)
-        })
-        .sum::<i64>()
-        .to_string()
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    use rstest::rstest;
-
-    #[rstest]
-    #[case('p', 16)]
-    #[case('L', 38)]
-    #[case('P', 42)]
-    #[case('v', 22)]
-    #[case('t', 20)]
-    #[case('s', 19)]
-    fn t_priority(#[case] item: char, #[case] expect: i64) {
-        assert_eq!(priority(item), expect)
-    }
-
-    #[test]
-    fn t_compartments() {
-        let compartments = get_rucksack_compartments("vJrwpWtwJgWrhcsFMMfFFhFp");
-
-        assert_eq!(compartments[0], "vJrwpWtwJgWr");
-        assert_eq!(compartments[1], "hcsFMMfFFhFp");
-
-        assert_eq!(get_common_item(&compartments), 'p');
-    }
-
-    #[test]
-    fn t_common_items3() {
-        assert_eq!(
-            get_common_item(&[
-                "vJrwpWtwJgWrhcsFMMfFFhFp".to_owned(),
-                "jqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL".to_owned(),
-                "PmmdzqPrVvPwwTWBwg".to_owned()
-            ]),
-            'r'
-        );
-        assert_eq!(
-            get_common_item(&[
-                "wMqvLMZHhHMvwLHjbvcjnnSBnvTQFn".to_owned(),
-                "ttgJtRGJQctTZtZT".to_owned(),
-                "CrZsJsPPZsGzwwsLwLmpwMDw".to_owned()
-            ]),
-            'Z'
-        );
-    }
-
-    #[test]
-    fn t_part1() {
-        assert_eq!(part1(crate::read_input(3)), "8039");
-    }
-
-    #[test]
-    fn t_part2() {
-        assert_eq!(part2(crate::read_input(3)), "2510");
-    }
-}
diff --git a/src/day4.rs b/src/day4.rs
deleted file mode 100644
index 438250f..0000000
--- a/src/day4.rs
+++ /dev/null
@@ -1,76 +0,0 @@
-//! Day 4: Camp Cleanup
-
-use std::ops::RangeInclusive;
-
-fn get_ranges(input: Vec<String>) -> Vec<(RangeInclusive<u32>, RangeInclusive<u32>)> {
-    // 31-31,32-40
-    input
-        .into_iter()
-        .map(|line| {
-            let (r1, r2) = line.split_once(',').unwrap();
-            (parse_range(r1), parse_range(r2))
-        })
-        .collect()
-}
-
-fn parse_range(s: &str) -> RangeInclusive<u32> {
-    let (a, b) = s.split_once('-').unwrap();
-    RangeInclusive::new(a.parse().unwrap(), b.parse().unwrap())
-}
-
-pub fn part1(input: Vec<String>) -> String {
-    let ranges = get_ranges(input);
-
-    ranges
-        .iter()
-        .filter(|(a, b)| {
-            (b.start() >= a.start() && b.end() <= a.end())
-                || (a.start() >= b.start() && a.end() <= b.end())
-        })
-        .count()
-        .to_string()
-}
-
-pub fn part2(input: Vec<String>) -> String {
-    let ranges = get_ranges(input);
-
-    ranges
-        .iter()
-        .filter(|(a, b)| {
-            a.contains(b.start())
-                || a.contains(b.end())
-                || b.contains(a.start())
-                || b.contains(a.end())
-        })
-        .count()
-        .to_string()
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn t_example() {
-        let input = vec![
-            "2-4,6-8".to_owned(),
-            "2-3,4-5".to_owned(),
-            "5-7,7-9".to_owned(),
-            "2-8,3-7".to_owned(),
-            "6-6,4-6".to_owned(),
-            "2-6,4-8".to_owned(),
-        ];
-        assert_eq!(part1(input.clone()), "2");
-        assert_eq!(part2(input), "4");
-    }
-
-    #[test]
-    fn t_part1() {
-        assert_eq!(part1(crate::read_input(4)), "556");
-    }
-
-    #[test]
-    fn t_part2() {
-        assert_eq!(part2(crate::read_input(4)), "876");
-    }
-}
diff --git a/src/day5.rs b/src/day5.rs
deleted file mode 100644
index 90d76d1..0000000
--- a/src/day5.rs
+++ /dev/null
@@ -1,134 +0,0 @@
-//! Day 5: Supply Stacks
-
-use once_cell::sync::Lazy;
-use regex::Regex;
-
-type Stacks = Vec<Vec<char>>;
-
-fn split_input(input: &[String]) -> (&[String], &[String]) {
-    let mut parts = input.split(|i| i.is_empty());
-    (parts.next().unwrap(), parts.next().unwrap())
-}
-
-fn parse_stacks(stacks: &[String]) -> Stacks {
-    let mut lines = stacks.iter().rev();
-    let index_line = lines.next().unwrap();
-    let n_stacks = index_line.trim().split_ascii_whitespace().count();
-
-    let mut stacks = (0..n_stacks).map(|_| Vec::new()).collect::<Vec<_>>();
-
-    for line in lines {
-        for (i, stack) in stacks.iter_mut().enumerate() {
-            let char_i = i * 4 + 1;
-
-            if let Some(char_str) = line.get(char_i..char_i + 1) {
-                let c = char_str.chars().next().unwrap();
-                if c != ' ' {
-                    if !c.is_ascii_uppercase() {
-                        panic!("invalid crate char: `{}`", c)
-                    }
-                    stack.push(c);
-                }
-            }
-        }
-    }
-    stacks
-}
-
-struct Instruction {
-    n: usize,
-    from: usize,
-    to: usize,
-}
-
-fn parse_instruction(instr: &str) -> Instruction {
-    static INSTR_REGEX: Lazy<Regex> =
-        Lazy::new(|| Regex::new("move (\\d+) from (\\d+) to (\\d+)").unwrap());
-    let cap = INSTR_REGEX.captures(instr).unwrap();
-
-    let n = cap.get(1).unwrap().as_str().parse::<usize>().unwrap();
-    let from = cap.get(2).unwrap().as_str().parse::<usize>().unwrap() - 1;
-    let to = cap.get(3).unwrap().as_str().parse::<usize>().unwrap() - 1;
-    Instruction { n, from, to }
-}
-
-fn apply_instruction(stacks: &mut Stacks, instr: &str) {
-    let instr = parse_instruction(instr);
-
-    for _ in 0..instr.n {
-        let c = stacks[instr.from].pop().unwrap();
-        stacks[instr.to].push(c);
-    }
-}
-
-fn apply_instruction2(stacks: &mut Stacks, instr: &str) {
-    let instr = parse_instruction(instr);
-
-    let si = stacks[instr.from].len() - instr.n;
-    let mut crates = stacks[instr.from].split_off(si);
-    stacks[instr.to].append(&mut crates);
-}
-
-pub fn part1(input: Vec<String>) -> String {
-    let (stacks, instr) = split_input(&input);
-    let mut stacks = parse_stacks(stacks);
-
-    instr.iter().for_each(|i| apply_instruction(&mut stacks, i));
-
-    stacks
-        .iter()
-        .map(|stack| stack.last().copied().unwrap_or(' '))
-        .collect()
-}
-
-pub fn part2(input: Vec<String>) -> String {
-    let (stacks, instr) = split_input(&input);
-    let mut stacks = parse_stacks(stacks);
-
-    instr
-        .iter()
-        .for_each(|i| apply_instruction2(&mut stacks, i));
-
-    stacks
-        .iter()
-        .map(|stack| stack.last().copied().unwrap_or(' '))
-        .collect()
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    fn example_input() -> Vec<String> {
-        const EXAMPLE: &str = r#"    [D]
-[N] [C]
-[Z] [M] [P]
- 1   2   3
-
-move 1 from 2 to 1
-move 3 from 1 to 3
-move 2 from 2 to 1
-move 1 from 1 to 2"#;
-        EXAMPLE.lines().map(str::to_owned).collect()
-    }
-
-    #[test]
-    fn t_example_1() {
-        assert_eq!(part1(example_input()), "CMZ");
-    }
-
-    #[test]
-    fn t_example_2() {
-        assert_eq!(part2(example_input()), "MCD");
-    }
-
-    #[test]
-    fn t_part1() {
-        assert_eq!(part1(crate::read_input(5)), "TWSGQHNHL");
-    }
-
-    #[test]
-    fn t_part2() {
-        assert_eq!(part2(crate::read_input(5)), "JNRSCDWPP");
-    }
-}
diff --git a/src/day6.rs b/src/day6.rs
deleted file mode 100644
index e9e7fd7..0000000
--- a/src/day6.rs
+++ /dev/null
@@ -1,57 +0,0 @@
-//! Day 6: Tuning Trouble
-
-use itertools::Itertools;
-
-fn get_input(input: &[String]) -> Vec<char> {
-    input.iter().next().unwrap().chars().collect()
-}
-
-fn find_header(input: &[char], n_unique: usize) -> usize {
-    let (i_start, _) = input
-        .windows(n_unique)
-        .enumerate()
-        .find(|(_, window)| window.iter().all_unique())
-        .unwrap();
-    i_start + n_unique
-}
-
-pub fn part1(input: Vec<String>) -> String {
-    let input = get_input(&input);
-    find_header(&input, 4).to_string()
-}
-
-pub fn part2(input: Vec<String>) -> String {
-    let input = get_input(&input);
-    find_header(&input, 14).to_string()
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn t_example1() {
-        assert_eq!(
-            part1(vec!["mjqjpqmgbljsphdztnvjfqwrcgsmlb".to_owned()]),
-            "7"
-        );
-    }
-
-    #[test]
-    fn t_example2() {
-        assert_eq!(
-            part2(vec!["mjqjpqmgbljsphdztnvjfqwrcgsmlb".to_owned()]),
-            "19"
-        );
-    }
-
-    #[test]
-    fn t_part1() {
-        assert_eq!(part1(crate::read_input(6)), "1300");
-    }
-
-    #[test]
-    fn t_part2() {
-        assert_eq!(part2(crate::read_input(6)), "3986");
-    }
-}
diff --git a/src/day7.rs b/src/day7.rs
deleted file mode 100644
index 7a95e6f..0000000
--- a/src/day7.rs
+++ /dev/null
@@ -1,143 +0,0 @@
-//! Day 7: No Space Left On Device
-
-use std::collections::HashMap;
-
-enum TermLine<'a> {
-    CdRoot,
-    CdUp,
-    Cd(&'a str),
-    Dir(&'a str),
-    File(u32),
-    None,
-}
-
-fn parse_line(line: &str) -> TermLine {
-    match line.strip_prefix("$ ") {
-        Some(cmd) => match cmd.strip_prefix("cd ") {
-            Some(dir) => match dir {
-                "/" => TermLine::CdRoot,
-                ".." => TermLine::CdUp,
-                _ => TermLine::Cd(dir),
-            },
-            // Ignore ls command
-            None => TermLine::None,
-        },
-        None => {
-            let (i_size, i_name) = line.split_once(' ').unwrap();
-            if i_size == "dir" {
-                TermLine::Dir(i_name)
-            } else {
-                TermLine::File(i_size.parse().unwrap())
-            }
-        }
-    }
-}
-
-fn get_dir_size<S: AsRef<str>>(input: &[S], dir_path: &[&str]) -> u32 {
-    let mut path = Vec::new();
-    let mut size = 0;
-
-    for line in input {
-        match parse_line(line.as_ref()) {
-            TermLine::CdRoot => path.clear(),
-            TermLine::CdUp => {
-                path.pop();
-            }
-            TermLine::Cd(dir) => path.push(dir),
-            TermLine::Dir(name) => {
-                if path == dir_path {
-                    let mut i_path = path.clone();
-                    i_path.push(name);
-                    size += get_dir_size(input, &i_path);
-                }
-            }
-            TermLine::File(i_size) => {
-                if path == dir_path {
-                    size += i_size
-                }
-            }
-            TermLine::None => {}
-        }
-    }
-    size
-}
-
-fn get_dir_sizes<S: AsRef<str>>(input: &[S]) -> HashMap<Vec<&str>, u32> {
-    let mut dir_sizes: HashMap<Vec<&str>, u32> = HashMap::new();
-    let mut path = Vec::new();
-
-    for line in input.iter() {
-        let path_upd = match parse_line(line.as_ref()) {
-            TermLine::CdRoot => {
-                path.clear();
-                true
-            }
-            TermLine::CdUp => {
-                path.pop();
-                true
-            }
-            TermLine::Cd(dir) => {
-                path.push(dir);
-                true
-            }
-            _ => false,
-        };
-
-        if path_upd && !dir_sizes.contains_key(&path) {
-            let dir_size = get_dir_size(input, &path);
-            dir_sizes.insert(path.clone(), dir_size);
-        }
-    }
-    dir_sizes
-}
-
-pub fn part1(input: Vec<String>) -> String {
-    let dir_sizes = get_dir_sizes(&input);
-    dir_sizes
-        .values()
-        .filter(|size| size <= &&100_000)
-        .sum::<u32>()
-        .to_string()
-}
-
-pub fn part2(input: Vec<String>) -> String {
-    let dir_sizes = get_dir_sizes(&input);
-
-    let total_size = dir_sizes[&Vec::new()];
-    let unused = 70_000_000 - total_size;
-    let to_free = 30_000_000 - unused;
-
-    dir_sizes
-        .values()
-        .filter(|size| size >= &&to_free)
-        .min()
-        .unwrap()
-        .to_string()
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const DAY: u8 = 7;
-
-    #[test]
-    fn t_example1() {
-        assert_eq!(part1(crate::read_example(DAY)), "95437");
-    }
-
-    #[test]
-    fn t_example2() {
-        assert_eq!(part2(crate::read_example(DAY)), "24933642");
-    }
-
-    #[test]
-    fn t_part1() {
-        assert_eq!(part1(crate::read_input(DAY)), "1084134");
-    }
-
-    #[test]
-    fn t_part2() {
-        assert_eq!(part2(crate::read_input(DAY)), "6183184");
-    }
-}
diff --git a/src/day8.rs b/src/day8.rs
deleted file mode 100644
index 528d39f..0000000
--- a/src/day8.rs
+++ /dev/null
@@ -1,151 +0,0 @@
-//! Day 8: Treetop Tree House
-
-type Grid = Vec<Vec<u8>>;
-
-fn parse_grid(input: &[String]) -> Grid {
-    let mut grid = Grid::new();
-
-    for line in input {
-        let mut grid_ln = Vec::new();
-        for tree in line.chars() {
-            let tree_h = tree.to_digit(10).unwrap() as u8;
-            grid_ln.push(tree_h);
-        }
-        grid.push(grid_ln);
-    }
-    grid
-}
-
-fn is_tree_visible(grid: &Grid, x: usize, y: usize) -> bool {
-    let h = grid.len();
-    let w = grid[0].len();
-    let tree_height = grid[y][x];
-
-    if x == 0 || x == w - 1 || y == 0 || y == h - 1 {
-        return true;
-    }
-
-    if (0..x).all(|xi| grid[y][xi] < tree_height) {
-        return true;
-    }
-
-    if (x + 1..w).all(|xi| grid[y][xi] < tree_height) {
-        return true;
-    }
-
-    if (0..y).all(|yi| grid[yi][x] < tree_height) {
-        return true;
-    }
-
-    if (y + 1..h).all(|yi| grid[yi][x] < tree_height) {
-        return true;
-    }
-
-    false
-}
-
-fn scenic_score(grid: &Grid, x: usize, y: usize) -> usize {
-    let h = grid.len();
-    let w = grid[0].len();
-    let tree_height = grid[y][x];
-
-    let side_score = |start: i64, end: i64, coord: usize, is_x: bool| {
-        let mut coord2 = start;
-        let mut n = 1;
-
-        while coord2 != end {
-            let h = if is_x {
-                grid[usize::try_from(coord2).unwrap()][coord]
-            } else {
-                grid[coord][usize::try_from(coord2).unwrap()]
-            };
-
-            if h >= tree_height {
-                return n;
-            }
-
-            if start < end {
-                coord2 += 1;
-            } else {
-                coord2 -= 1;
-            }
-            n += 1;
-        }
-        start.abs_diff(end)
-    };
-
-    let left = side_score(x as i64 - 1, -1, y, false);
-    let right = side_score(x as i64 + 1, w as i64, y, false);
-    let up = side_score(y as i64 - 1, -1, x, true);
-    let down = side_score(y as i64 + 1, h as i64, x, true);
-
-    (left * right * up * down).try_into().unwrap()
-}
-
-pub fn part1(input: Vec<String>) -> String {
-    let grid = parse_grid(&input);
-    let mut n: u32 = 0;
-
-    for (y, row) in grid.iter().enumerate() {
-        for x in 0..row.len() {
-            if is_tree_visible(&grid, x, y) {
-                n += 1;
-            }
-        }
-    }
-
-    n.to_string()
-}
-
-pub fn part2(input: Vec<String>) -> String {
-    let grid = parse_grid(&input);
-    let mut max_score = 0;
-
-    for (y, row) in grid.iter().enumerate() {
-        for x in 0..row.len() {
-            max_score = max_score.max(scenic_score(&grid, x, y));
-        }
-    }
-
-    max_score.to_string()
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const DAY: u8 = 8;
-
-    #[test]
-    fn t_example1() {
-        let input = crate::read_example(DAY);
-        let grid = parse_grid(&input);
-        assert!(is_tree_visible(&grid, 4, 0));
-        assert!(is_tree_visible(&grid, 1, 1));
-        assert!(!is_tree_visible(&grid, 3, 1));
-
-        assert_eq!(part1(input), "21");
-    }
-
-    #[test]
-    fn tmp() {
-        let input = crate::read_example(DAY);
-        let grid = parse_grid(&input);
-        dbg!(scenic_score(&grid, 2, 3));
-    }
-
-    #[test]
-    fn t_example2() {
-        assert_eq!(part2(crate::read_example(DAY)), "8");
-    }
-
-    #[test]
-    fn t_part1() {
-        assert_eq!(part1(crate::read_input(DAY)), "1533");
-    }
-
-    #[test]
-    fn t_part2() {
-        assert_eq!(part2(crate::read_input(DAY)), "345744");
-    }
-}
diff --git a/src/day9.rs b/src/day9.rs
deleted file mode 100644
index eac4fe4..0000000
--- a/src/day9.rs
+++ /dev/null
@@ -1,258 +0,0 @@
-//! Day 9: Rope Bridge
-
-use std::{collections::HashSet, fmt::Debug};
-
-use itertools::Itertools;
-
-#[derive(Default, Clone, Copy, PartialEq, Eq, Hash)]
-struct Position {
-    x: i32,
-    y: i32,
-}
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-enum Direction {
-    U,
-    D,
-    R,
-    L,
-}
-
-impl Position {
-    fn move_dir(self, dir: Direction) -> Self {
-        match dir {
-            Direction::U => Self {
-                x: self.x,
-                y: self.y + 1,
-            },
-            Direction::D => Self {
-                x: self.x,
-                y: self.y - 1,
-            },
-            Direction::R => Self {
-                x: self.x + 1,
-                y: self.y,
-            },
-            Direction::L => Self {
-                x: self.x - 1,
-                y: self.y,
-            },
-        }
-    }
-
-    fn dx(self, p2: Position) -> i32 {
-        self.x - p2.x
-    }
-
-    fn dy(self, p2: Position) -> i32 {
-        self.y - p2.y
-    }
-}
-
-impl Debug for Position {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        f.write_fmt(format_args!("{}|{}", self.x, self.y))
-    }
-}
-
-fn update_rope_pos(hpos: Position, tpos: Position) -> (Position, Position) {
-    let dx = hpos.dx(tpos);
-    let dy = hpos.dy(tpos);
-
-    match (dx.abs() < 2, dy.abs() < 2) {
-        (true, true) => (hpos, tpos),
-        (true, false) => (
-            hpos,
-            Position {
-                x: hpos.x,
-                y: hpos.y - dy + dy.signum(),
-            },
-        ),
-        (false, true) => (
-            hpos,
-            Position {
-                x: hpos.x - dx + dx.signum(),
-                y: hpos.y,
-            },
-        ),
-        (false, false) => (
-            hpos,
-            Position {
-                x: hpos.x - dx + dx.signum(),
-                y: hpos.y - dy + dy.signum(),
-            },
-        ),
-    }
-}
-
-fn parse_line(line: &str) -> (Direction, i32) {
-    let (d_str, n_str) = line.split_once(' ').unwrap();
-    let d = match d_str {
-        "U" => Direction::U,
-        "D" => Direction::D,
-        "R" => Direction::R,
-        "L" => Direction::L,
-        _ => panic!("invalid dir: {}", d_str),
-    };
-    (d, n_str.parse().unwrap())
-}
-
-fn print_rope(rope: &[Position]) {
-    let (min_x, max_x) = match rope.iter().map(|p| p.x).minmax() {
-        itertools::MinMaxResult::NoElements => return,
-        itertools::MinMaxResult::OneElement(x) => (x, x),
-        itertools::MinMaxResult::MinMax(min_x, max_x) => (min_x, max_x),
-    };
-    let (min_y, max_y) = match rope.iter().map(|p| p.y).minmax() {
-        itertools::MinMaxResult::NoElements => return,
-        itertools::MinMaxResult::OneElement(y) => (y, y),
-        itertools::MinMaxResult::MinMax(min_y, max_y) => (min_y, max_y),
-    };
-
-    for y in (min_y..=max_y).rev() {
-        for x in min_x..=max_x {
-            if let Some((n, _)) = rope.iter().find_position(|p| p == &&Position { x, y }) {
-                print!("{}", n)
-            } else {
-                print!(".");
-            }
-        }
-        println!();
-    }
-    println!();
-}
-
-pub fn part1(input: Vec<String>) -> String {
-    let mut visited = HashSet::new();
-
-    let mut hpos = Position::default();
-    let mut tpos = Position::default();
-    visited.insert(tpos);
-
-    for (dir, n) in input.iter().map(|line| parse_line(line)) {
-        for _ in 0..n {
-            (hpos, tpos) = update_rope_pos(hpos.move_dir(dir), tpos);
-            visited.insert(tpos);
-        }
-    }
-
-    visited.len().to_string()
-}
-
-pub fn part2(input: Vec<String>) -> String {
-    let mut visited = HashSet::new();
-    let rope_len = 10;
-
-    // head of the rope first
-    let mut rope = (0..rope_len)
-        .map(|_| Position::default())
-        .collect::<Vec<_>>();
-    visited.insert(rope[rope_len - 1]);
-
-    for (dir, n) in input.iter().map(|line| parse_line(line)) {
-        for _ in 0..n {
-            let mut new_rope = Vec::with_capacity(rope_len);
-            let mut rope_iter = rope.iter();
-            let mut hpos = rope_iter.next().copied().unwrap().move_dir(dir);
-
-            for tpos in rope_iter {
-                let (n_hpos, n_tpos) = update_rope_pos(hpos, *tpos);
-                new_rope.push(n_hpos);
-                // Tail pos of this section will be head pos of next section
-                hpos = n_tpos;
-            }
-            new_rope.push(hpos);
-            rope = new_rope;
-            visited.insert(rope[rope_len - 1]);
-            // print_rope(&rope);
-        }
-    }
-
-    print_rope(&rope);
-    visited.len().to_string()
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    use rstest::rstest;
-
-    const DAY: u8 = 9;
-
-    #[rstest]
-    #[case(
-        Position {x: 0, y: 0},
-        Position {x: 0, y: 0},
-        Direction::R,
-        Position {x: 0, y: 0},
-    )]
-    #[case(
-        Position {x: 1, y: 0},
-        Position {x: 0, y: 0},
-        Direction::R,
-        Position {x: 1, y: 0},
-    )]
-    #[case(
-        Position {x: 4, y: 1},
-        Position {x: 3, y: 0},
-        Direction::U,
-        Position {x: 4, y: 1},
-    )]
-    #[case(
-        Position {x: 4, y: 4},
-        Position {x: 4, y: 3},
-        Direction::L,
-        Position {x: 4, y: 3},
-    )]
-    #[case(
-        Position {x: 3, y: 4},
-        Position {x: 4, y: 3},
-        Direction::L,
-        Position {x: 3, y: 4},
-    )]
-    fn rope_pos(
-        #[case] hpos: Position,
-        #[case] tpos: Position,
-        #[case] dir: Direction,
-        #[case] exp: Position,
-    ) {
-        let (_, tpos) = update_rope_pos(hpos.move_dir(dir), tpos);
-        assert_eq!(tpos, exp);
-    }
-
-    #[test]
-    fn t_example1() {
-        assert_eq!(part1(crate::read_example(DAY)), "13");
-    }
-
-    #[test]
-    fn t_example2() {
-        assert_eq!(part2(crate::read_example(DAY)), "1");
-    }
-
-    #[test]
-    fn t_example2b() {
-        let input = vec![
-            "R 5".to_owned(),
-            "U 8".to_owned(),
-            "L 8".to_owned(),
-            "D 3".to_owned(),
-            "R 17".to_owned(),
-            "D 10".to_owned(),
-            "L 25".to_owned(),
-            "U 20".to_owned(),
-        ];
-        assert_eq!(part2(input), "36");
-    }
-
-    #[test]
-    fn t_part1() {
-        assert_eq!(part1(crate::read_input(DAY)), "6332");
-    }
-
-    #[test]
-    fn t_part2() {
-        assert_eq!(part2(crate::read_input(DAY)), "2511");
-    }
-}
diff --git a/src/main.rs b/src/main.rs
index 3579986..2b6dff1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,52 +1,14 @@
-use std::{
-    fs::File,
-    io::{BufRead, BufReader},
-    path::Path,
-};
-
-use path_macro::path;
-
 mod day0;
 mod day1;
-mod day2;
-mod day3;
-mod day4;
-mod day5;
-mod day6;
-mod day7;
-mod day8;
-mod day9;
-
-pub(crate) fn read_input(day: u8) -> Vec<String> {
-    read_input_file(path!("input" / format!("day{}.txt", day)))
-}
-
-#[cfg(test)]
-pub(crate) fn read_example(day: u8) -> Vec<String> {
-    read_input_file(path!("example" / format!("day{}.txt", day)))
-}
-
-fn read_input_file<P: AsRef<Path>>(path: P) -> Vec<String> {
-    let f = File::open(path).expect("could not read input file");
-    let mut input = BufReader::new(f).lines().flatten().collect::<Vec<_>>();
-    if let Some(last) = input.last() {
-        if last.is_empty() {
-            input.pop();
-        }
-    }
-    input
-}
 
 macro_rules! days {
-    ( $($n:expr, $module:ident,)* ) => {
-        fn get_result(day: u8, part: u8) -> String {
-            let input = read_input(day);
-
+    ( $($n:expr, $module:ident),* ) => {
+        fn get_result(day: u8, part: u8) -> i64 {
             match day {
                 $(
                     $n => match part {
-                        2 => $module::part2(input),
-                        _ => $module::part1(input),
+                        2 => $module::part2(),
+                        _ => $module::part1(),
                     }
                 )*
                 _ => panic!("day {} missing", day),
@@ -57,15 +19,7 @@ macro_rules! days {
 
 days! {
     0, day0,
-    1, day1,
-    2, day2,
-    3, day3,
-    4, day4,
-    5, day5,
-    6, day6,
-    7, day7,
-    8, day8,
-    9, day9,
+    1, day1
 }
 
 fn main() {