#include <cstdlib>
#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <stack>
#include <queue>
#define rep(i,n) for (int i=0;i<(n);i++)
#define debug(x) cout<<#x<<": "<<x<<endl

using namespace std;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    
    int a[3] = {0}, cnt = 0;
    //cin >> N;
    
     rep(i, 3) cin >> a[i];
     a[1] += a[2] / 25;
     a[2] = a[2] % 25;
            
     a[0] += a[1] / 4;
     a[1] = a[1] % 4;
    
     //a[3] += a[2] / 10;
     a[0] = a[0] % 10;
    
    
    cout << a[0] + a[1] + a[2] << endl;
    system("PAUSE");
    return EXIT_SUCCESS;
}