21 lines
559 B
Text
21 lines
559 B
Text
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import java.util.Scanner
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import java.util.regex.Pattern
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val pattern: Pattern = Pattern.compile("mul\\([0-9]+,[0-9]+\\)|do\\(\\)|don't\\(\\)")
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val scanner = Scanner(System.`in`)
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var sum = 0
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var enabled = true
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while (true) {
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val next: String = scanner.findWithinHorizon(pattern, 0) ?: break
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when (next) {
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"do()" -> enabled = true
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"don't()" -> enabled = false
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else -> if (enabled) {
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sum += next.replace("mul(", "").replace(")", "").split(",").map { it.toInt() }.let { (a, b) -> a*b }
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}
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}
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}
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println(sum)
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