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| author | tchojnacki <tomaszchojnacki2001@gmail.com> | 2021-12-07 13:02:22 +0100 |
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| committer | tchojnacki <tomaszchojnacki2001@gmail.com> | 2021-12-07 13:02:22 +0100 |
| commit | 7b2fce9c718eae56dc8a06aa4b4c4830dbd45e38 (patch) | |
| tree | f53e29ba7c44260af026c75128ee5312165822e1 | |
| parent | 4db920b62c8d9f611d18d4c5402c1957ba9f162d (diff) | |
| download | gleam_aoc2020-7b2fce9c718eae56dc8a06aa4b4c4830dbd45e38.tar.gz gleam_aoc2020-7b2fce9c718eae56dc8a06aa4b4c4830dbd45e38.zip | |
Complete day 7
| -rw-r--r-- | README.md | 58 | ||||
| -rw-r--r-- | src/Day07.kt | 25 |
2 files changed, 54 insertions, 29 deletions
@@ -1,38 +1,38 @@ # Advent of Code 2021 in Kotlin  - - + + Welcome to the Advent of Code[^aoc] Kotlin project created by [tchojnacki][github] using the [Advent of Code Kotlin Template][template] delivered by JetBrains. ## Progress -| Day | Part 1 | Part 2 | -|-----------------------------|:------:|:------:| -| Day 1: Sonar Sweep | 🌟 | 🌟 | -| Day 2: Dive! | 🌟 | 🌟 | -| Day 3: Binary Diagnostic | 🌟 | 🌟 | -| Day 4: Giant Squid | 🌟 | 🌟 | -| Day 5: Hydrothermal Venture | 🌟 | 🌟 | -| Day 6: Lanternfish | 🌟 | 🌟 | -| Day 7: ??? | | | -| Day 8: ??? | | | -| Day 9: ??? | | | -| Day 10: ??? | | | -| Day 11: ??? | | | -| Day 12: ??? | | | -| Day 13: ??? | | | -| Day 14: ??? | | | -| Day 15: ??? | | | -| Day 16: ??? | | | -| Day 17: ??? | | | -| Day 18: ??? | | | -| Day 19: ??? | | | -| Day 20: ??? | | | -| Day 21: ??? | | | -| Day 22: ??? | | | -| Day 23: ??? | | | -| Day 24: ??? | | | -| Day 25: ??? | | | +| Day | Part 1 | Part 2 | +|--------------------------------|:------:|:------:| +| Day 1: Sonar Sweep | 🌟 | 🌟 | +| Day 2: Dive! | 🌟 | 🌟 | +| Day 3: Binary Diagnostic | 🌟 | 🌟 | +| Day 4: Giant Squid | 🌟 | 🌟 | +| Day 5: Hydrothermal Venture | 🌟 | 🌟 | +| Day 6: Lanternfish | 🌟 | 🌟 | +| Day 7: The Treachery of Whales | 🌟 | 🌟 | +| Day 8: ??? | | | +| Day 9: ??? | | | +| Day 10: ??? | | | +| Day 11: ??? | | | +| Day 12: ??? | | | +| Day 13: ??? | | | +| Day 14: ??? | | | +| Day 15: ??? | | | +| Day 16: ??? | | | +| Day 17: ??? | | | +| Day 18: ??? | | | +| Day 19: ??? | | | +| Day 20: ??? | | | +| Day 21: ??? | | | +| Day 22: ??? | | | +| Day 23: ??? | | | +| Day 24: ??? | | | +| Day 25: ??? | | | [^aoc]: 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)) +} |