#!/usr/bin/env perl use strict; use warnings; my $n = <>; chomp$n; my @vs = split/ /, <>; chomp$vs[$n-1]; for (my $i = 1; $i < 2 * $n - 3; $i++) { for (my $p = 0; $p < $n; $p++) { my $q = $i - $p; next unless ($p < $n && $q < $n); if ($vs[$p] < $vs[$q]) { ($vs[$p], $vs[$q]) = ($vs[$q], $vs[$p]); } } } print join(' ', @vs) . "\n";