30 lines
610 B
Kotlin
30 lines
610 B
Kotlin
package be.vandewalleh.aoc.days
|
|
|
|
import be.vandewalleh.aoc.utils.input.Day
|
|
import be.vandewalleh.aoc.utils.input.Lines
|
|
|
|
@Day(1)
|
|
class Day01(@Lines val items: IntArray) {
|
|
fun part1(): Int? {
|
|
items.forEach { a ->
|
|
items.forEach { b ->
|
|
if (a + b == 2020) return a * b
|
|
}
|
|
}
|
|
return null
|
|
}
|
|
|
|
fun part2(): Int? {
|
|
items.forEach { a ->
|
|
items.forEach { b ->
|
|
items.forEach { c ->
|
|
if (a + b + c == 2020) return a * b * c
|
|
}
|
|
}
|
|
}
|
|
return null
|
|
}
|
|
|
|
}
|
|
|