31 lines
813 B
Kotlin
31 lines
813 B
Kotlin
package be.vandewalleh.aoc.days
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import be.vandewalleh.aoc.utils.input.Day
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import be.vandewalleh.aoc.utils.input.Input
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import be.vandewalleh.aoc.utils.input.Text
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import be.vandewalleh.aoc.utils.input.createDay
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import org.eclipse.collections.impl.factory.primitive.CharBags
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@Day(6)
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class Day06(@Text val input: Input<String>) {
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private val groups = input.value.split("\n\n")
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fun part1() = groups.sumBy { it.replace("\n", "").toCharArray().toSet().size }
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fun part2() = groups.sumBy {
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val group = it.split("\n")
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val bag = CharBags.mutable.empty()
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group.forEach { chars: String -> chars.forEach { bag.add(it) } }
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bag.selectByOccurrences { group.size == it }.toSet().size()
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}
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}
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fun main() = with(createDay<Day06>()) {
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println(part1())
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println(part2())
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}
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