Advent of Code - Day 11 Kotlin

Day11Kotlin.kt

package Advent2017

import util.FileIO

fun hexDistance(x: Int, y: Int): Int {
    return maxOf(Math.abs(x), Math.abs(y), Math.abs(x + y))
}



fun main(args: Array<String>) {
    val map = hashMapOf<String, Pair<Int, Int>>()
    map.put("n", Pair(0, -1))
    map.put("ne", Pair(1, -1))
    map.put("se", Pair(1, 0))
    map.put("s", Pair(0, 1))
    map.put("sw", Pair(-1, 1))
    map.put("nw", Pair(-1, 0))

    val input = FileIO.getFileAsString("advent2017_day11.txt")

    var x = 0
    var y = 0

    var dist = 0
    var furthest = 0

    for (each in input.split(",")) {
        val move = map.get(each)
        if (move != null) {
            x += move.first
            y += move.second
            dist = hexDistance(x, y)
            if (dist > furthest) furthest = dist
        }
    }
    println("Part 1: $dist")
    println("Part 2: $furthest")

}