advent-of-code-2024/day7/part1.kts

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2024-12-06 21:51:21 -07:00
#!/usr/bin/env kotlin
import java.io.File
import java.time.Instant
import java.util.*
val start = Instant.now()
val tests = File("./input.txt").readLines().map {
Pair(it.split(": ")[0], it.split(": ")[1])
}.map {
Pair(it.first.toLong(), it.second.split(" ").map { n -> n.toLong() })
}
var finalResult = 0L
tests.forEach { (test, values) ->
var results = LinkedList<Long>()
results.add(values[0])
for (i in 1..<values.size) {
val iter = results.listIterator();
while (iter.hasNext()) {
val result = iter.next()
iter.set(result * values[i])
iter.add(result + values[i])
}
}
if (test in results) {
finalResult += test
}
}
val time = (Instant.now().toEpochMilli() - start.toEpochMilli())
println("Result: ${finalResult}\nTime: ${time}ms")