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Day02.kt
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Day02.kt
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import java.io.BufferedReader
import java.io.File
import kotlin.streams.toList
fun main() {
println(Day02().part1())
println(Day02().part2())
}
class Day02 {
fun part1(noun: Int = 12, verb: Int = 2): Int {
val input = File("files/day2.txt").bufferedReader().readLine()
val vals = input.split(",").map { x: String -> x.toInt() }.toMutableList()
vals[1] = noun
vals[2] = verb
for (i in 0..vals.size step 4) {
when {
vals[i] == 1 -> vals[vals[i + 3]] = vals[vals[i + 1]] + vals[vals[i + 2]]
vals[i] == 2 -> vals[vals[i + 3]] = vals[vals[i + 1]] * vals[vals[i + 2]]
vals[i] == 99 -> return vals[0]
else -> return -1
}
}
return -1
}
fun part2(): Int {
for (i in 0..99) {
for (j in 0..99) {
if (part1(i, j) == 19690720) {
return 100 * i + j
}
}
}
return -1
}
}