chrisly42/advent-of-code
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Minor kotlinization :)

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This commit is contained in:
Chris Hodges 2024-12-11 07:54:26 +01:00
parent 34c0c213c4
commit 778b38b3a4
1 changed files with 13 additions and 17 deletions
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12
src/aoc2024/Day11.kt
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@ -24,12 +24,9 @@ fun main() {
return -1 return -1
} }
fun rec(n: Long, i: Int): Long { fun rec(n: Long, i: Int): Long =
//println("$i $n") if (i == 0) 1 else lookupTable.getOrPut(n to i) {
if (i == 0) return 1 if (n == 0L) {
val ll = lookupTable[n to i]
if (ll != null) return ll
val result = if (n == 0L) {
rec(1L, i - 1) rec(1L, i - 1)
} else { } else {
val size = fastCeilLog10(n) val size = fastCeilLog10(n)
@ -41,10 +38,9 @@ fun main() {
rec(n * 2024L, i - 1) rec(n * 2024L, i - 1)
} }
} }
lookupTable[n to i] = result
return result
} }
fun part1(input: List<String>): Long { fun part1(input: List<String>): Long {
val numbers = input[0].splitLongs() val numbers = input[0].splitLongs()
return numbers.sumOf { rec(it, 25) } return numbers.sumOf { rec(it, 25) }