42 lines
707 B
Typst
42 lines
707 B
Typst
#import "/src/utils.typ": *
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#let solveable(values, target) = {
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if values.len() == 1 {
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return values.last() == target
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}
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let values = values
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let v = values.pop()
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if calc.rem(target, v) == 0 {
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if solveable(values, target / v) {
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return true
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}
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}
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if v > target {
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return false
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}
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return solveable(values, target - v)
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}
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#let solve(input) = {
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let equations = input.split("\n")
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let total = 0
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for equation in equations {
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let (target, values) = equation.split(": ")
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target = int(target)
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values = values.split(" ").map(int)
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if solveable(values, target) {
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total += target
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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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7, 1,
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solve,
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example: 3749
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) |