27 lines
707 B
Text
27 lines
707 B
Text
|
#!/usr/bin/env kotlin
|
||
|
|
|
||
|
|
import java.io.File
|
||
|
|
import java.util.LinkedList
|
||
|
|
import kotlin.math.log10
|
||
|
|
|
||
|
|
val stones = LinkedList(File("input.txt").readLines()[0].split(" ").map { it.toLong() })
|
||
|
|
|
||
|
|
for (i in 0..<25) {
|
||
|
|
val iter = stones.listIterator()
|
||
|
|
|
||
|
|
while (iter.hasNext()) {
|
||
|
|
val stone = iter.next()
|
||
|
|
|
||
|
|
if (stone == 0L) {
|
||
|
|
iter.set(1)
|
||
|
|
} else if ((log10(stone.toDouble()).toInt() + 1) % 2 == 0) {
|
||
|
|
val str = stone.toString()
|
||
|
|
iter.set(str.substring(0, str.length / 2).toLong())
|
||
|
|
iter.add(str.substring(str.length / 2, str.length).toLong())
|
||
|
|
} else {
|
||
|
|
iter.set(stone * 2024)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
println("Result: ${stones.size}")
|