#!/usr/bin/env perl
use strict;

sub merge {
	my ($a, $b) = @_;
	my @c;
	while (@{$a} > 0 && @{$b} > 0) {
		if ($a->[0] > $b->[0]) {
			push @c, $b->[0];
			shift @{$b};
		} else {
			push @c, $a->[0];
			shift @{$a};
		}
	}
	while (@{$a} > 0) {
		push @c, $a->[0];
		shift @{$a};
	}
	while (@{$b} > 0) {
		push @c, $b->[0];
		shift @{$b};
	}
	return \@c;
}

sub mergesort {
	my ($a) = @_;
	my $n = scalar @{$a};
	if ($n <= 1) {
		return $a;
	}

	my (@l1, @l2);
	my $i = 0;
	while ($i < $n / 2) {
		push @l1, $a->[$i];
		$i++;
	}
	while ($i < $n) {
		push @l2, $a->[$i];
		$i++;
	}
	
	my $r_l1 = mergesort(\@l1);
	my $r_l2 = mergesort(\@l2);
	return merge($r_l1, $r_l2);
}

my @numbers = (47448054, 1106251565, 1208921855, 170086026, 840395770, 444281018, 1297307905, 1613614128, 357068250, 1829657695, 654555439, 1261773796, 1821640729, 449683981, 1062536538, 96076061, 1387478498, 1835855315, 364455615, 4830124, 864633601, 289493189, 471351435, 435996916, 1366312031, 888420407, 1923379522, 735726044, 1094401518, 245520239, 109946712, 1107893495, 592868510, 700148765, 273016388, 343881444, 420725947, 1259049694, 1692920986, 71271532, 1154617350, 593508009, 1106700528, 430204045, 1045928775, 1330476642, 49983990, 1451164767, 1175404600, 644832496, 365016297, 1048732794, 503615317, 217186301, 1176160338, 1183622513, 81711049, 1720671278, 1393072097, 1315236388, 1451774341, 92848458, 271000544, 1667871288, 380233084, 1053079658, 1249341507, 1276652307, 1722015039, 1243698025, 178813868, 1449271074, 1994327579, 270972819, 1043379189, 1592595484, 462468972, 1464773315, 1994172406, 997300623, 46405283, 1614271949, 447907123, 317292284, 378291676, 1253835093, 523476912, 1606023999, 59263848, 1234358080, 140981643, 1828471854, 1197394207, 1317927546, 878287915, 334576359, 982149842, 642878238, 1024064999, 1834342299);
for (my $i = 0; $i < 3000; $i++) {
	mergesort(\@numbers);
}