44 lines
690 B
Perl
44 lines
690 B
Perl
package part1;
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use 5.20.0;
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use warnings;
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use experimental qw/
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signatures
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postderef
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switch
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/;
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sub parse_code($lines) {
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return map { [ split ] }
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split "\n", $lines
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}
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sub run_once($index,$accum,$code) {
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my( $op, $val ) = $code->[$index]->@*;
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given( $op ) {
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when( 'nop' ) { $index++ }
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when( 'acc' ) { $index++; $accum += $val; }
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when( 'jmp' ) { $index += $val; }
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}
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return ( $index, $accum );
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}
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sub solution($lines) {
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my @code = parse_code($lines);
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my $index = 0;
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my $accum = 0;
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my %seen;
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until( $seen{$index}++ ) {
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($index,$accum) = run_once($index,$accum,\@code);
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}
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return $accum;
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}
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1;
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