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- use 5.012;
- sub smart_join {
- my $num = shift;
- my @num_arr = 1..$num;
- join '-',$num % 2 ? @num_arr : reverse @num_arr;
- }
- my $num_in = $ARGV[0] // 6;
- say smart_join( $_ ) for 1..$num_in;
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