//7 20 10 1210

#include <iostream>

using namespace std;

int main() {
    int l, m, n, ans;
    cin >> l >> m >> n;
    int x = (100*l + 25*m + 1*n);
    const int y = (x %= 1000);
    
    ans = y/100 + (y%100)/25 + ((y%100)%25);
    cout << ans <<endl;
    return 0;
}