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day-13.roc
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app "day-13"
packages {
pf: "https://github.com/roc-lang/basic-cli/releases/download/0.7.0/bkGby8jb0tmZYsy2hg1E_B2QrCgcSTxdUlHtETwm5m4.tar.br",
parser: "./parser/package/main.roc",
array2d: "https://github.com/mulias/roc-array2d/releases/download/v0.1.0/ssMT0bDIv-qE7d_yNUyCByGQHvpNkQJZsGUS6xEFsIY.tar.br",
}
imports [
pf.Stdout,
pf.Task.{ Task },
pf.Utc,
"inputs/day-13.txt" as inputData : Str,
array2d.Array2D.{ Array2D },
]
provides [main] to pf
main : Task {} *
main =
start <- Task.await Utc.now
result = sum inputData
end <- Task.await Utc.now
_ <- Task.await (Stdout.line "answer \(Num.toStr result)")
Stdout.line "delta \(Num.toStr (Utc.deltaAsMillis start end))"
sum = \input ->
input
|> Str.trim
|> Str.split "\n\n"
|> List.walk (0, 0) \state, a ->
(state.0 + summarize a, state.1 + summarizeVertical a)
|> \a -> a.0 * 100 + a.1
summarizeVertical = \input ->
list =
Str.split input "\n"
|> List.map Str.graphemes
|> Array2D.fromLists FitShortest
|> Array2D.rotateClockwise
|> Array2D.toLists
|> List.map \a1 -> Str.joinWith a1 ""
when list is
[a, ..] -> summarizeHelp 0 [a] (List.dropFirst list 1)
_ -> 0
summarize = \input ->
list = Str.split input "\n"
when list is
[a, ..] -> summarizeHelp 0 [a] (List.dropFirst list 1)
_ -> 0
summarizeHelp = \state, left, right ->
if List.isEmpty left || List.isEmpty right then
0
else if areSame left right then
state + 1
else
when right is
[a, ..] ->
summarizeHelp
(state + 1)
(List.prepend left a)
(List.dropFirst right 1)
_ -> 0
areSame = \a, b ->
when (a, b) is
([a1, ..], [b1, ..]) ->
if a1 == b1 then
areSame (List.dropFirst a 1) (List.dropFirst b 1)
else
Bool.false
_ -> Bool.true
expect
input =
"""
#..########..##
....#....#....#
.##...##...##..
.##...##...##..
####.#..#.####.
##############.
.##...##...##..
......##......#
.##.#....#.##..
##.#......#.###
####......####.
"""
result = sum input
result == 7
expect
input =
"""
#####...####.#.
##..###..#..#.#
...#.###.....#.
...#.###.....#.
##..###..#..#.#
#####...####.#.
##....####.....
#..##.....#..#.
#..##.....#..#.
##....####.....
#####...######.
##..###..#..#.#
...#.###.....#.
"""
result = sum input
result == 300
expect
input =
"""
#.##..##.
..#.##.#.
##......#
##......#
..#.##.#.
..##..##.
#.#.##.#.
#...##..#
#....#..#
..##..###
#####.##.
#####.##.
..##..###
#....#..#
"""
result = sum input
result == 405
expect
input =
"""
#.##..##.
..#.##.#.
##......#
##......#
..#.##.#.
..##..##.
#.#.##.#.
#...##..#
#....#..#
..##..###
#####.##.
#####.##.
..##..###
#....#..#
#####...####.#.
##..###..#..#.#
...#.###.....#.
...#.###.....#.
##..###..#..#.#
#####...####.#.
##....####.....
#..##.....#..#.
#..##.....#..#.
##....####.....
#####...######.
##..###..#..#.#
...#.###.....#.
#..########..##
....#....#....#
.##...##...##..
.##...##...##..
####.#..#.####.
##############.
.##...##...##..
......##......#
.##.#....#.##..
##.#......#.###
####......####.
"""
result = sum input
result == 712
expect
input =
"""
...##.#
.##.###
.##.###
...##.#
#...###
.#..##.
##.##.#
...####
#.#.###
#....#.
..#.##.
..#.##.
#....#.
#.#.#.#
...####
###..##.######.##
..#..#.#......#.#
#.##.#..#.##.#..#
#.#.##.#..##..#.#
#..#...###..###..
#..#...###..###..
#.#.##.#..##..#.#
#.##.#..#.##.#..#
..#..#.#......#.#
###..##.######.##
...#.#..######..#
..###....#..#..#.
#.###....#..#....
##.#####.#..#.###
...#.....####....
..#...#.#.##.#.#.
...###.#......#.#
##.##.#####
#.####.#..#
#.####.#..#
##.##.###.#
########...
.#....#....
###..#####.
..#.#.#...####.
..#.#...#....##
##.##.#..##....
...#..#.....#..
##......#.##.#.
..####.#.#.#...
..####.#.###...
"""
result = sum input
result == 705
expect
input =
"""
###..##.######.##
..#..#.#......#.#
#.##.#..#.##.#..#
#.#.##.#..##..#.#
#..#...###..###..
#..#...###..###..
#.#.##.#..##..#.#
#.##.#..#.##.#..#
..#..#.#......#.#
###..##.######.##
...#.#..######..#
..###....#..#..#.
#.###....#..#....
##.#####.#..#.###
...#.....####....
..#...#.#.##.#.#.
...###.#......#.#
"""
result = sum input
result == 500
expect
input =
"""
...##.#
.##.###
.##.###
...##.#
#...###
.#..##.
##.##.#
...####
#.#.###
#....#.
..#.##.
..#.##.
#....#.
#.#.#.#
...####
"""
result = sum input
result == 200
expect
input =
"""
##.##.#####
#.####.#..#
#.####.#..#
##.##.###.#
########...
.#....#....
###..#####.
"""
result = sum input
result == 4