comment on


    printf "\e[102m Count[$num] = %s\e[m\n\n", persist($num, $dbg);
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You are not using printf correctly.


    printf "\e[102m Count[%s] = %s\e[m\n\n", $num, persist($num, $dbg)
+;
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The first argument is a FORMAT string and using variable interpolation could introduce an invalid '%' character.


    my @dbg = ( );
    map { push @dbg, ($res *= $_) } split(//, $num);
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You are not using map correctly:


    my @dbg = map { $res *= $_ } split(//, $num);
[download]

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