#include<bits/stdc++.h>
using namespace std;

int main(){
    int L,M,N,T;
    cin >> L >> M >> N;

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

    cout << L+M+N << endl;

    return 0;
}