1 files changed, 0 insertions, 51 deletions
diff --git a/2021-kotlin/src/Day03.kt b/2021-kotlin/src/Day03.kt
deleted file mode 100644
index 1418a2e..0000000
--- a/2021-kotlin/src/Day03.kt
+++ /dev/null
@@ -1,51 +0,0 @@
-object Day03 {
-    private fun addLists(l1: List<Int>, l2: List<Int>) = l1.zip(l2).map { it.first + it.second }
-
-    private fun valueOfBits(bitList: List<Int>) = bitList.reduce { acc, bit -> acc * 2 + bit }
-
-    private fun invertBits(bitList: List<Int>) = bitList.map { bit -> 1 - bit }
-
-    private fun mostCommonBits(input: List<List<Int>>): List<Int> =
-        input
-            .reduce(::addLists)
-            .map { bit -> if (bit.toDouble() / input.size >= 0.5) 1 else 0 }
-
-    private fun selectByBitCriteria(
-        input: List<List<Int>>,
-        comparisonCriteria: (currentList: List<List<Int>>) -> List<Int>
-    ): List<Int>? {
-        var list = input
-        var index = 0
-
-        while (list.size > 1 && index < list[0].size) {
-            list = list.filter { e -> e[index] == comparisonCriteria(list)[index] }
-            index += 1
-        }
-
-        return list.getOrNull(0)
-    }
-
-    fun part1(input: List<List<Int>>): Int =
-        mostCommonBits(input)
-            .let { gammaBits ->
-                val epsilonBits = invertBits(gammaBits)
-                return valueOfBits(gammaBits) * valueOfBits(epsilonBits)
-            }
-
-    fun part2(input: List<List<Int>>): Int {
-        val oxygenRating = selectByBitCriteria(input) { mostCommonBits(it) }!!
-        val scrubberRating = selectByBitCriteria(input) { invertBits(mostCommonBits(it)) }!!
-
-        return valueOfBits(oxygenRating) * valueOfBits(scrubberRating)
-    }
-}
-
-fun main() {
-    val testInput = readInputAsBitLists("Day03_test")
-    check(Day03.part1(testInput) == 198)
-    check(Day03.part2(testInput) == 230)
-
-    val input = readInputAsBitLists("Day03")
-    println(Day03.part1(input))
-    println(Day03.part2(input))
-}