29 lines
922 B
Kotlin
Executable File
29 lines
922 B
Kotlin
Executable File
#!/usr/bin/env kotlin
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import java.io.File
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import java.util.Scanner
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import kotlin.math.abs
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val scanner = Scanner(File("day01input.txt"))
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val firstList = mutableListOf<Int>()
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val secondList = mutableListOf<Int>()
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var secondMap = mutableMapOf<Int, Int>()
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while (scanner.hasNextLine()) {
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val line = scanner.nextLine()
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val numbers = line.split(" ")
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val firstNumber = numbers[0].toInt()
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val secondNumber = numbers[1].toInt()
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firstList.add(firstNumber)
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secondList.add(secondNumber)
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secondMap[secondNumber] = (secondMap[secondNumber] ?: 0) + 1
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}
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firstList.sort()
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secondList.sort()
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var totaldistance = 0
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var similarityscore = 0
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for (i in firstList.indices) {
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val distance = abs(firstList[i] - secondList[i])
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totaldistance += distance
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similarityscore += (secondMap[firstList[i]] ?: 0) * firstList[i]
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}
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println("Total distance: $totaldistance")
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println("Similarity score: $similarityscore") |