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Diffstat (limited to 'aoc/2021/03/part-two.raku')
| -rw-r--r-- | aoc/2021/03/part-two.raku | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/aoc/2021/03/part-two.raku b/aoc/2021/03/part-two.raku new file mode 100644 index 0000000..71464a2 --- /dev/null +++ b/aoc/2021/03/part-two.raku @@ -0,0 +1,8 @@ +sub filter(&op, @report, $column=0) { + return parse-base @report[0].join, 2 unless @report.elems > 1; + my $common = ([+] map *[$column], @report) > (@report.elems - 1) div 2; + filter &op, (grep { op $_[$column], $common }, @report), $column + 1 +} + +my $input = map *.comb, words slurp 'input'; +put [*] map { filter $_, $input }, (&infix:<==>, &infix:<!=>) |