#include <iostream>
using namespace std;

int main(void){
  int l,m,n,o=0;
  cin >> l >> m >> n;
  if(n>25){
    int a = n/25;
    n -= a*25; m += a;
  }

  if(m > 4){
    int a = m/4;
    m -= a*4; l += a;
  }

  if(l>10){
    int a = l/10;
    l -= 10*a;o+=a;
  }
  cout << l + m + n << endl;

}