FWIW: this passed with a time of 4.56s. The main difference between this and failing attempts -- besides the correction for dups -- is preallocation of the array size:

$max = <>;
$#n = $max;
++$n[ $_ ] while <>;
defined $n[$_] and print "$_\n" x $n[$_] for 0 .. $#n;
exit 0;

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In reply to Re^3: Sorting challenge (Insertion sort) by BrowserUk
in thread Sorting challenge by PerlSufi

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