33 lines
673 B
Typst
33 lines
673 B
Typst
#import "/src/utils.typ": *
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#let solve(input) = {
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let lines = input.split("\n")
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let w = lines.first().len()
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let h = lines.len()
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let perms = (("M", "S"), ("S", "M"))
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let total = 0
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for y in range(1, h - 1) {
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for x in range(1, w - 1) {
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if lines.at(y).at(x) == "A" {
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let tl = lines.at(y - 1).at(x - 1)
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let tr = lines.at(y - 1).at(x + 1)
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let bl = lines.at(y + 1).at(x - 1)
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let br = lines.at(y + 1).at(x + 1)
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let tlbr = (tl, br)
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let bltr = (bl, tr)
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if tlbr in perms and bltr in perms {
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total += 1
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}
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}
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}
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}
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return total
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}
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#show-puzzle(
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4, 2,
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solve,
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example: 9
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) |