53 lines
1.0 KiB
Kotlin
53 lines
1.0 KiB
Kotlin
import java.io.File
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fun main() {
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val lines = File("input.txt").readLines()
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val directions = lines.map { line -> line.split(' ', limit = 2).let { it[0] to it[1].toInt() } }
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println("Part 1:")
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part1(directions)
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println()
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println("Part 2:")
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part2(directions)
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}
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private fun part1(directions: List<Pair<String, Int>>) {
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var position = 0
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var depth = 0
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for ((direction, distance) in directions) {
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when (direction) {
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"forward" -> position += distance
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"up" -> depth -= distance
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"down" -> depth += distance
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}
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}
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println("Position: $position")
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println("Depth: $depth")
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println("Multiplied: ${position * depth}")
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}
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private fun part2(directions: List<Pair<String, Int>>) {
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var position = 0
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var depth = 0
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var aim = 0
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for ((direction, distance) in directions) {
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when (direction) {
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"forward" -> {
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position += distance
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depth += aim * distance
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}
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"up" -> aim -= distance
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"down" -> aim += distance
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}
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}
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println("Position: $position")
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println("Depth: $depth")
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println("Multiplied: ${position * depth}")
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}
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