use strict;
use warnings;
use feature qw(say);

my @symbols = (
    [ 1000, 'M' ],
    [ 900,  'CM' ],
    [ 500,  'D' ],
    [ 400,  'CD' ],
    [ 100,  'C' ],
    [ 90,   'XC' ],
    [ 50,   'L' ],
    [ 40,   'XL' ],
    [ 10,   'X' ],
    [ 9,    'IX' ],
    [ 5,    'V' ],
    [ 4,    'IV' ],
    [ 1,    'I' ]
);

sub roman {
    my ( $n, $r ) = ( shift, '' );
    ( $r, $n ) = ( '-', -$n ) if $n < 0;   
    foreach my $s (@symbols) {
        my ( $arabic, $roman ) = @$s;
        ( $r, $n ) = ( $r .= $roman x int( $n / $arabic ), $n % $arabic )
          if $n >= $arabic;
    }
    $r;
}

say roman($_) for 1 .. 100;