67 lines
1.9 KiB
Plaintext
67 lines
1.9 KiB
Plaintext
func check[lines: Array, x: i64, y: i64, dx: i64, dy: i64] : bool
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if x + dx * 3 < 0 || x + dx * 3 >= lines->size || y + dy * 3 < 0 || y + dy * 3 >= str.len(array.nth(lines, 0))
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return false
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if array.nth(lines, x)[y] != 'X'
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return false
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if array.nth(lines, x + dx)[y + dy] != 'M'
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return false
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if array.nth(lines, x + dx * 2)[y + dy * 2] != 'A'
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return false
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if array.nth(lines, x + dx * 3)[y + dy * 3] != 'S'
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return false
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return true
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func part1[lines: Array] : void
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out := 0
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for x in 0..lines->size
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for y in 0..str.len(array.nth(lines, x))
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if check(lines, x, y, 0, 1)
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out += 1
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if check(lines, x, y, 0, -1)
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out += 1
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if check(lines, x, y, 1, 0)
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out += 1
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if check(lines, x, y, -1, 0)
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out += 1
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if check(lines, x, y, 1, 1)
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out += 1
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if check(lines, x, y, -1, -1)
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out += 1
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if check(lines, x, y, 1, -1)
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out += 1
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if check(lines, x, y, -1, 1)
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out += 1
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io.println_i64(out)
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func part2[lines: Array] : void
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out := 0
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s := _stackalloc(5) as str
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for x in 1..lines->size-1
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for y in 1..str.len(array.nth(lines, x))-1
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if array.nth(lines, x)[y] == 'A'
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s[0] = array.nth(lines, x - 1)[y - 1]
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s[1] = array.nth(lines, x + 1)[y - 1]
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s[2] = array.nth(lines, x + 1)[y + 1]
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s[3] = array.nth(lines, x - 1)[y + 1]
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s[4] = 0
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if str.equal(s, "MSSM") || str.equal(s, "SMMS") || str.equal(s, "MMSS") || str.equal(s, "SSMM")
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out += 1
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io.println_i64(out)
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func main[] : i64
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~input, ok := io.read_text_file("input.txt")
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if !ok
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panic("failed to open input.txt")
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lines := str.split(input, "\n")
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part1(lines)
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part2(lines)
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