#include <bits/stdc++.h>
#define rep(i, n) for(int i = 0; i < (n); i++)
using namespace std;
using P = pair<int, int>;
using ll = long long;

int main(){
	int l, m, n;
	cin >> l >> m >> n;
	
	m += n/25;
	l += m/4;
	cout << l/100 + m%4 + n%25 << endl;
}