#include<iostream>
using namespace std;

int main()
{
    int L, M, N;
    int num;
    
    cin >> L;
    cin >> M;
    cin >> N;
  
    num = 0;

    num += N%25;
    M += N/25;
    num += M%4;
    L += M/4;
    num += L%10;

    cout << num << endl;
        
}