#include <iostream>
#include <string>
using namespace std;

int main(int argc, char**argv)
{
	int l,m,n;
	cin >> l >> m >> n;

	int cngN = (n/25);
	m += cngN;
	n -= (cngN*25);

	int cngM = (m/4);
	m -= (cngM*4);
	l += cngM;

	int cngL = (l/10);
	l -= (cngL*10);

	cout << (n+m+l) << endl;
	return 0;
}