#include <iostream>
using namespace std;
int main(){
  int l,m,n;
  cin>>l;
  cin>>m;
  cin>>n;
  if(n/25>0){
    m+=n/25;
    n-=n/25*25;
  }
  if(m/4>0){
    l+=m/4;
    m-=m/4*4;
  }
  if(l/10>0){
    l-=l/10*10;
  }
  int x;
  x=l+m+n;
  cout<<x<<endl;
  return 0;
}