1 files changed, 0 insertions, 40 deletions
diff --git a/2021-kotlin/src/Day09.kt b/2021-kotlin/src/Day09.kt
deleted file mode 100644
index 9d0c41d..0000000
--- a/2021-kotlin/src/Day09.kt
+++ /dev/null
@@ -1,40 +0,0 @@
-object Day09 {
-    private fun Map<Pos2D, Int>.getLowPoints() =
-        filter { (pos, num) -> Pos2D.directions4.all { num < getOrDefault(pos + it, 9) } }
-
-    fun part1(input: List<String>) =
-        parseToMap(input).getLowPoints().values.sumOf { it + 1 }
-
-    fun part2(input: List<String>): Int {
-        val map = parseToMap(input)
-
-        fun traverseBasin(pos: Pos2D, acc: MutableSet<Pos2D>) {
-            acc.add(pos)
-            Pos2D.directions4
-                .map { pos + it }
-                .filter { !acc.contains(it) && map.getOrDefault(it, 9) < 9 }
-                .forEach { traverseBasin(it, acc) }
-        }
-
-        return map
-            .getLowPoints()
-            .map {
-                val visited = mutableSetOf<Pos2D>()
-                traverseBasin(it.key, visited)
-                visited.size
-            }
-            .sortedDescending()
-            .take(3)
-            .sum()
-    }
-}
-
-fun main() {
-    val testInput = readInputAsLines("Day09_test")
-    check(Day09.part1(testInput) == 15)
-    check(Day09.part2(testInput) == 1134)
-
-    val input = readInputAsLines("Day09")
-    println(Day09.part1(input))
-    println(Day09.part2(input))
-}