#!/usr/bin/perl my $a = 0; my $b=0; die unless($ARGV[0]); open(my $f, "<", $ARGV[0]) or die $!; while(readline($f)) { if (/(\d+) before/) { $a = $1; } if (/(\d+) after/ ) { $b = $1; } } if ($a > $b * 2) { printf("Compacted\n"); }