diff options
author | tchojnacki <tomaszchojnacki2001@gmail.com> | 2021-12-07 13:02:22 +0100 |
---|---|---|
committer | tchojnacki <tomaszchojnacki2001@gmail.com> | 2021-12-07 13:02:22 +0100 |
commit | 7b2fce9c718eae56dc8a06aa4b4c4830dbd45e38 (patch) | |
tree | f53e29ba7c44260af026c75128ee5312165822e1 /src | |
parent | 4db920b62c8d9f611d18d4c5402c1957ba9f162d (diff) | |
download | gleam_aoc2020-7b2fce9c718eae56dc8a06aa4b4c4830dbd45e38.tar.gz gleam_aoc2020-7b2fce9c718eae56dc8a06aa4b4c4830dbd45e38.zip |
Complete day 7
Diffstat (limited to 'src')
-rw-r--r-- | src/Day07.kt | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/Day07.kt b/src/Day07.kt new file mode 100644 index 0000000..204dca4 --- /dev/null +++ b/src/Day07.kt @@ -0,0 +1,25 @@ +import kotlin.math.absoluteValue + +fun main() { + fun part1(input: String): Int { + val numbers = input.trim().split(",").map(String::toInt) + val range = numbers.minOrNull()!!..numbers.maxOrNull()!! + + return range.minOf { n -> numbers.sumOf { (it - n).absoluteValue } } + } + + fun part2(input: String): Int { + val numbers = input.trim().split(",").map(String::toInt) + val range = numbers.minOrNull()!!..numbers.maxOrNull()!! + + return range.minOf { n -> numbers.map { (it - n).absoluteValue }.sumOf { (it * (it + 1)) / 2 } } + } + + val testInput = readInputAsString("Day07_test") + check(part1(testInput) == 37) + check(part2(testInput) == 168) + + val input = readInputAsString("Day07") + println(part1(input)) + println(part2(input)) +} |