diff options
Diffstat (limited to 'aoc/2021/11/part-one.raku')
| -rw-r--r-- | aoc/2021/11/part-one.raku | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/aoc/2021/11/part-one.raku b/aoc/2021/11/part-one.raku new file mode 100644 index 0000000..88cf4eb --- /dev/null +++ b/aoc/2021/11/part-one.raku @@ -0,0 +1,12 @@ +sub adj($i, $k) { [&&] map -2 < * < 2, [«-»] map { polymod $_: 10 }, ($i, $k) } +sub flash(@level, $count) { + my $i = first * > 9, @level, :k; + return ({ max $_, 0 } for @level), $count without $i; + flash ({ $i == $^k ?? -8 !! $^v + adj $i, $^k } for @level.kv), $count + 1 +} +sub step($times, @level, $count=0) { + return $count unless $times > 0; + step $times - 1, |flash @level »+» 1, $count +} +my $input = lines slurp 'input'; +put step 100, $input.join.comb |