diff options
Diffstat (limited to 'aoc/2021/11/part-two.raku')
| -rw-r--r-- | aoc/2021/11/part-two.raku | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/aoc/2021/11/part-two.raku b/aoc/2021/11/part-two.raku new file mode 100644 index 0000000..a362b16 --- /dev/null +++ b/aoc/2021/11/part-two.raku @@ -0,0 +1,9 @@ +sub adj($i, $k) { [&&] map -2 < * < 2, [«-»] map { polymod $_: 10 }, ($i, $k) } +sub flash(@level) { + my $i = first * > 9, @level, :k; + return map { max $_, 0 }, @level without $i; + flash map { $i == $^k ?? -8 !! $^v + adj $i, $^k }, @level.kv +} +sub step(@level) { (0 == all @level) ?? 0 !! 1 + step flash @level »+» 1 } +my $input = lines slurp 'input'; +put step $input.join.comb |