#!/uer/bin/perl

use strict;
use warnings;

my $l = <>;
my $m = <>;
my $n = <>;

if($n >= 25) {
	my $ans = $n / 25;
	$ans = int $ans;
	$m += $ans;
	$n -= $ans * 25;
}
if($m >= 4) {
	my $ans = $m / 4;
	$ans = int $ans;
	$l += $ans;
	$m -= $ans * 4;
}
if($l >= 10) {
	my $ans = $l / 10;
	$ans = int $ans;
	$l -= $ans * 10;
}

print $l + $m + $n;
print "\n";

exit;