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Day01.kt
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Day01.kt
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import java.io.File
import java.util.LinkedList
fun main() {
fun part1(list: List<String>): Int {
var prev = -1
var counter = 0
list.forEach {
val current = it.toInt()
if (prev != -1 && current > prev) {
counter++
}
prev = current
}
return counter
}
fun part2(list: List<String>): Int {
val window = LinkedList<Int>()
var windowTotal = 0
var prev = -1
var counter = 0
list.forEach {
val current = it.toInt()
window.add(current)
windowTotal += current
// Ensure that sliding window will have maximum 3 items
if (window.size > 3) {
windowTotal -= window.removeFirst()
}
if (window.size == 3) {
if (prev != -1 && windowTotal > prev) {
counter++
}
prev = windowTotal
}
}
return counter
}
val input = File("input", "Day01.txt").readLines()
println(part1(input))
println(part2(input))
}