Merge branch 'main' of ssh://git.fedaya.net:16357/AdventOfCode/2024

day4/common.py

@@ -1,3 +1,3 @@
-def parse(filename: str) -> list[str]:
+def parse(filename: str) -> list[int]:
     with open(filename) as f:
         return [line.strip() for line in f.readlines()]

day4/part2.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python
+from common import parse
+
+
+def is_x_mas(input: list[str], x: int, y: int) -> bool:
+    return "".join([input[y + i][x + i] for i in range(3)]) in ["MAS", "SAM"] and "".join(
+        [input[y + 2 - i][x + i] for i in range(3)]
+    ) in ["MAS", "SAM"]
+
+
+def solve(input: list[str]) -> str:
+    starts = [(x, y) for x in range(len(input[0]) - 2) for y in range(len(input) - 2)]
+    return len(list(filter(lambda p: is_x_mas(input, p[0], p[1]), starts)))
+
+
+def main():
+    print(solve(parse("input")))
+
+
+if __name__ == "__main__":
+    main()

get_input.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 day=$1
+if [ ! -d day${day} ]; then
 	mkdir day${day}
 	cp template/* day${day}
+fi
 curl -o day${day}/input --cookie ~/AdventOfCode/2024/cookies.txt https://adventofcode.com/2024/day/$day/input