use strict; use warnings; my (%rules, @ticket, @nearby); while (<>) { chomp; if (/([^:]+): (\d+)-(\d+) or (\d+)-(\d+)/) { $rules{$1} = [$2, $3, $4, $5]; } elsif (/your ticket:/) { <>; chomp; @ticket = split ','; } elsif (/^[\d,]+$/) { my @fields = split ','; push @nearby, \@fields; } } my $error = 0; foreach my $t (@nearby) { foreach my $f (@$t) { my $valid = 0; foreach my $r (values %rules) { $valid = 1 if $f >= $$r[0] && $f <= $$r[1]; $valid = 1 if $f >= $$r[2] && $f <= $$r[3]; } $error += $f unless $valid; } } print "$error\n";