#include<iostream>

using namespace std;

int main(){
    int a=0;
    int b=0;
    int c=0;
    int l, m, n;
    cin >> l >> m >> n;
    
    if(n >= 25){
        a = n / 25;
        m += a;
        n -= a*25;
    }
    
    if(m >= 4){
        b = m / 4;
        l += b;
        m -= b*4;
    }
    
    if(l >= 10){
        c = l / 10;
        l -= c*10;
    }
    
    cout << l+m+n << endl;
}