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Ruby/2024/04: add solution

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Felix Bargfeldt 2024-12-04 10:18:45 +01:00
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README.md
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# AdventOfCode
[Advent of Code](https://adventofcode.com/) solutions in [<img height=12 src=".assets/rs.svg"> Rust](Rust), [<img height=12 src=".assets/ua.png"> Uiua](Uiua), [<img height=12 src=".assets/py.svg"> Python](Python), [<img height=12 src=".assets/apl.svg"> APL](APL), [<img height=12 src=".assets/hs.svg"> Haskell](Haskell), [<img height=12 src=".assets/nix.svg"> Nix](Nix), [<img height=12 src=".assets/rb.svg"> Ruby](Ruby) and [<img height=12 src=".assets/nu.svg"> Nu](Nu)
[Advent of Code](https://adventofcode.com/) solutions in [<img height=12 src=".assets/rs.svg"> Rust](Rust), [<img height=12 src=".assets/ua.png"> Uiua](Uiua), [<img height=12 src=".assets/py.svg"> Python](Python), [<img height=12 src=".assets/apl.svg"> APL](APL), [<img height=12 src=".assets/hs.svg"> Haskell](Haskell), [<img height=12 src=".assets/rb.svg"> Ruby](Ruby), [<img height=12 src=".assets/nix.svg"> Nix](Nix) and [<img height=12 src=".assets/nu.svg"> Nu](Nu)
### Global Leaderboard Placement
|Year|Rank|Score|Top% (Leaderboard)|Top% (All participants)|
@ -9,11 +9,11 @@
|[2021](https://adventofcode.com/2021/leaderboard)|**136**|438|13.41% (of 1014)|0.0532% (of &ge;255548)|
|[2020](https://adventofcode.com/2020/leaderboard)|**621**|46|65.23% (of 952)|0.3146% (of &ge;197402)|
## [2024](https://adventofcode.com/2024) ([<img height=18 src=".assets/rs.svg"> Rust](Rust/2024): 4/25 | [<img height=18 src=".assets/ua.png"> Uiua](Uiua/2024): 4/25 | [<img height=18 src=".assets/hs.svg"> Haskell](Haskell/2024): 3/25 | [<img height=18 src=".assets/rb.svg"> Ruby](Ruby/2024): 3/25 | [<img height=18 src=".assets/nix.svg"> Nix](Nix/2024): 1/25)
## [2024](https://adventofcode.com/2024) ([<img height=18 src=".assets/rs.svg"> Rust](Rust/2024): 4/25 | [<img height=18 src=".assets/ua.png"> Uiua](Uiua/2024): 4/25 | [<img height=18 src=".assets/rb.svg"> Ruby](Ruby/2024): 4/25 | [<img height=18 src=".assets/hs.svg"> Haskell](Haskell/2024): 3/25 | [<img height=18 src=".assets/nix.svg"> Nix](Nix/2024): 1/25)
|Mo|Tu|We|Th|Fr|Sa|Su|
|-|-|-|-|-|-|-|
|||||||[**1**](https://adventofcode.com/2024/day/1) [<img height=12 src=".assets/rs.svg">](Rust/2024/01.rs "Rust solution for 2024/01") [<img height=12 src=".assets/hs.svg">](Haskell/2024/01.hs "Haskell solution for 2024/01") [<img height=12 src=".assets/ua.png">](https://uiua.org/pad?src=JnNjCgrCsOKKn-KNieKKnOKKnOKLleKIqeKJoEBcbixAIC4K4oipLyviioMo4pmtw5fiip7iirg9fOKMtS3iiKnijYYpCg== "Uiua solution for 2024/01") [<img height=12 src=".assets/nix.svg">](Nix/2024/01.nix "Nix solution for 2024/01") [<img height=12 src=".assets/rb.svg">](Ruby/2024/01.rb "Ruby solution for 2024/01")|
|[**2**](https://adventofcode.com/2024/day/2) [<img height=12 src=".assets/rs.svg">](Rust/2024/02.rs "Rust solution for 2024/02") [<img height=12 src=".assets/hs.svg">](Haskell/2024/02.hs "Haskell solution for 2024/02") [<img height=12 src=".assets/ua.png">](https://uiua.org/pad?src=JnNjCgriipwo4pah4oqc4ouVKeKIqeKJoEBcbixAIC4KCkNoZWNrIOKGkCDDl-KKgygvw5fiiaQz4oy1fOKJjcKkMeKMteKXtMKxKeKniC0K4oipLyviiaHil4fiioMoL-KGpeKJoShDaGVja-KWvSniip7iiaAu4oeh4qe74p-cwqR8Q2hlY2spCg== "Uiua solution for 2024/02") [<img height=12 src=".assets/rb.svg">](Ruby/2024/02.rb "Ruby solution for 2024/02")|[**3**](https://adventofcode.com/2024/day/3) [<img height=12 src=".assets/rs.svg">](Rust/2024/03.rs "Rust solution for 2024/03") [<img height=12 src=".assets/hs.svg">](Haskell/2024/03.hs "Haskell solution for 2024/03") [<img height=12 src=".assets/ua.png">](https://uiua.org/pad?src=JnNjCgrilr3irJoxXCjihqXihqfiipnCsOKKnynijYniip_CrOKIqeKMlSJkb24ndCgpIiwiZG8oKSIuLgriiKkoLysvw5fii5Xihpgx4o2JcmVnZXgibXVsXFwoKFxcZCspLChcXGQrKVxcKSIpCg== "Uiua solution for 2024/03") [<img height=12 src=".assets/rb.svg">](Ruby/2024/03.rb "Ruby solution for 2024/03")|[**4**](https://adventofcode.com/2024/day/4) [<img height=12 src=".assets/rs.svg">](Rust/2024/04.rs "Rust solution for 2024/04") [<img height=12 src=".assets/ua.png">](https://uiua.org/pad?src=JnNjCgriipziiJjiiaBAXG4uCgripLAg4oaQIOKIqeKKleKWoeKKmSzijZzima3iipviip7iioMtK-KIqeKHocKw4oqf4oq44pazCgrin5woLyviiaHil4coLyvijJUiWE1BUyIp4oqC4p-c4o2a4oeM4oqC4oqDKOKKguKksHziioLiiKniiaHilqHin5zijYkpKQovK-KZreKniCjDl-KIqSgv4oal4omh4omN4pahIk1BUyLiioLin5zijZrih4wp4qSwKTNfMwo= "Uiua solution for 2024/04")|[**5**](https://adventofcode.com/2024/day/5)|[**6**](https://adventofcode.com/2024/day/6)|[**7**](https://adventofcode.com/2024/day/7)|[**8**](https://adventofcode.com/2024/day/8)|
|[**2**](https://adventofcode.com/2024/day/2) [<img height=12 src=".assets/rs.svg">](Rust/2024/02.rs "Rust solution for 2024/02") [<img height=12 src=".assets/hs.svg">](Haskell/2024/02.hs "Haskell solution for 2024/02") [<img height=12 src=".assets/ua.png">](https://uiua.org/pad?src=JnNjCgriipwo4pah4oqc4ouVKeKIqeKJoEBcbixAIC4KCkNoZWNrIOKGkCDDl-KKgygvw5fiiaQz4oy1fOKJjcKkMeKMteKXtMKxKeKniC0K4oipLyviiaHil4fiioMoL-KGpeKJoShDaGVja-KWvSniip7iiaAu4oeh4qe74p-cwqR8Q2hlY2spCg== "Uiua solution for 2024/02") [<img height=12 src=".assets/rb.svg">](Ruby/2024/02.rb "Ruby solution for 2024/02")|[**3**](https://adventofcode.com/2024/day/3) [<img height=12 src=".assets/rs.svg">](Rust/2024/03.rs "Rust solution for 2024/03") [<img height=12 src=".assets/hs.svg">](Haskell/2024/03.hs "Haskell solution for 2024/03") [<img height=12 src=".assets/ua.png">](https://uiua.org/pad?src=JnNjCgrilr3irJoxXCjihqXihqfiipnCsOKKnynijYniip_CrOKIqeKMlSJkb24ndCgpIiwiZG8oKSIuLgriiKkoLysvw5fii5Xihpgx4o2JcmVnZXgibXVsXFwoKFxcZCspLChcXGQrKVxcKSIpCg== "Uiua solution for 2024/03") [<img height=12 src=".assets/rb.svg">](Ruby/2024/03.rb "Ruby solution for 2024/03")|[**4**](https://adventofcode.com/2024/day/4) [<img height=12 src=".assets/rs.svg">](Rust/2024/04.rs "Rust solution for 2024/04") [<img height=12 src=".assets/ua.png">](https://uiua.org/pad?src=JnNjCgriipziiJjiiaBAXG4uCgripLAg4oaQIOKIqeKKleKWoeKKmSzijZzima3iipviip7iioMtK-KIqeKHocKw4oqf4oq44pazCgrin5woLyviiaHil4coLyvijJUiWE1BUyIp4oqC4p-c4o2a4oeM4oqC4oqDKOKKguKksHziioLiiKniiaHilqHin5zijYkpKQovK-KZreKniCjDl-KIqSgv4oal4omh4omN4pahIk1BUyLiioLin5zijZrih4wp4qSwKTNfMwo= "Uiua solution for 2024/04") [<img height=12 src=".assets/rb.svg">](Ruby/2024/04.rb "Ruby solution for 2024/04")|[**5**](https://adventofcode.com/2024/day/5)|[**6**](https://adventofcode.com/2024/day/6)|[**7**](https://adventofcode.com/2024/day/7)|[**8**](https://adventofcode.com/2024/day/8)|
|[**9**](https://adventofcode.com/2024/day/9)|[**10**](https://adventofcode.com/2024/day/10)|[**11**](https://adventofcode.com/2024/day/11)|[**12**](https://adventofcode.com/2024/day/12)|[**13**](https://adventofcode.com/2024/day/13)|[**14**](https://adventofcode.com/2024/day/14)|[**15**](https://adventofcode.com/2024/day/15)|
|[**16**](https://adventofcode.com/2024/day/16)|[**17**](https://adventofcode.com/2024/day/17)|[**18**](https://adventofcode.com/2024/day/18)|[**19**](https://adventofcode.com/2024/day/19)|[**20**](https://adventofcode.com/2024/day/20)|[**21**](https://adventofcode.com/2024/day/21)|[**22**](https://adventofcode.com/2024/day/22)|
|[**23**](https://adventofcode.com/2024/day/23)|[**24**](https://adventofcode.com/2024/day/24)|[**25**](https://adventofcode.com/2024/day/25)|26|27|28|29|

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Ruby/2024/04.rb Normal file
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input = File.read(ARGV[0]).lines.map &:strip
NEIGH = [
[-1, -1],
[-1, 0],
[-1, 1],
[0, -1],
[0, 1],
[1, -1],
[1, 0],
[1, 1],
]
w = input[0].length
h = input.length
puts (0...h).flat_map { |i|
(0...w).map { |j|
NEIGH
.filter { |n| (0...h).include?(i + 3 * n[0]) && (0...w).include?(j + 3 * n[1]) }
.count { |n| (0...4).map { input[i + _1 * n[0]][j + _1 * n[1]] }.join == "XMAS" }
}
}.sum
puts (1...h-1).map { |i|
(1...w-1).count { |j|
input[i][j] == "A" \
&& Set[input[i-1][j-1],input[i+1][j+1]] == Set[?M,?S] \
&& Set[input[i-1][j+1],input[i+1][j-1]] == Set[?M,?S]
}
}.sum