add solution day 6 in perl
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#!/usr/bin/env perl
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use strict;
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use warnings;
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use feature qw/ say /;
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use Test::More;
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ok( start_of_packet_marker("mjqjpqmgbljsphdztnvjfqwrcgsmlb") == 7 );
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ok( start_of_packet_marker("bvwbjplbgvbhsrlpgdmjqwftvncz") == 5 );
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ok( start_of_packet_marker("nppdvjthqldpwncqszvftbrmjlhg") == 6 );
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ok( start_of_packet_marker("nznrnfrfntjfmvfwmzdfjlvtqnbhcprsg") == 10 );
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ok( start_of_packet_marker("zcfzfwzzqfrljwzlrfnpqdbhtmscgvjw") == 11 );
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ok( start_of_message_marker("mjqjpqmgbljsphdztnvjfqwrcgsmlb") == 19 );
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ok( start_of_message_marker("bvwbjplbgvbhsrlpgdmjqwftvncz") == 23 );
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ok( start_of_message_marker("nppdvjthqldpwncqszvftbrmjlhg") == 23 );
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ok( start_of_message_marker("nznrnfrfntjfmvfwmzdfjlvtqnbhcprsg") == 29 );
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ok( start_of_message_marker("zcfzfwzzqfrljwzlrfnpqdbhtmscgvjw") == 26 );
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done_testing();
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sub start_of_packet_marker {
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my $datastream = shift;
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my $marker = 4;
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while ( !is_start_packet( substr( $datastream, ( $marker - 4 ), 4 ) ) ) {
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$marker++;
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}
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return $marker;
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}
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sub is_start_packet {
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my $packet = shift;
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my %packet = map { $_ => 1 } split( //, $packet );
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keys %packet == 4 ? return 1 : return 0;
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}
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sub start_of_message_marker {
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my $datastream = shift;
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my $marker = 14;
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while ( !is_start_message( substr( $datastream, ( $marker - 14 ), 14 ) ) ) {
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$marker++;
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}
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return $marker;
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}
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sub is_start_message {
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my $packet = shift;
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my %packet = map { $_ => 1 } split( //, $packet );
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keys %packet == 14 ? return 1 : return 0;
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}
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open( my $fh, "<", "input" )
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or die "Can't open < 'input': $!";
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my $line = <$fh>;
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say start_of_packet_marker($line);
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say start_of_message_marker($line);
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