#include <iostream>
using namespace std;
                                                                                                
  
int main(){


    int l, m, n;


    cin >> l >> m >> n;


    if( n >= 25 ){

        m += n / 25;

        n = n % 25;

        }

    if( m >= 4 ){

        l += m / 4;

        m = m % 4;

        }

    if( l >= 10 ){

        l = l % 10;

        }

    cout << l + m + n << endl;
                                            

    return 0;

}