2022/Day 15

Author: agrison

src/main/kotlin/me/grison/aoc/y2022/Day15.kt

@@ -32,8 +32,9 @@ class Day15 : Day(15, 2022) {
 
  override fun partTwo(): Long {
  val data = data()
+ val max = 4_000_000L
 
- for (i in 3_000_000L..4_000_000L) {
+ for (i in (max - 1_000_000L)..max) {
  val bounds = mutableListOf<LPosition>()
  for ((sensor, beacon) in data) {
  val distance = sensor.manhattan(beacon)
@@ -46,7 +47,7 @@ class Day15 : Day(15, 2022) {
  var last = 0L
  for ((bx, by) in bounds) {
  if (bx > last)
- return i * 4_000_000L + bx.dec()
+ return i * max + bx.dec()
  last = max(last, by);
  }
  }