use strict;
use warnings;
use utf8;

my $input = <STDIN>;
my $str = "";

chomp $input;

my $length = length $input;

if ($length == 2) {
    $str = "0" . $input;
} elsif ($length == 1) {
    $str = "00" . $input;
} else {
    $str = $input;
}

print "$str\n";