#include <algorithm>
#include <cstdio>
#include <cstdlib>
#include <cctype>
#include <cmath>
#include <iostream>
#include <queue>
#include <list>
#include <map>
#include <numeric>
#include <set>
#include <sstream>
#include <string>
#include <vector>
using namespace std;
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define rep(i,n) REP(i,0,n)
#define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it)
#define ALLOF(c) (c).begin(), (c).end()
typedef long long ll;


int main(){
  int P, L, M, N;
  P = 0;
  cin >> L;
  cin >> M;
  cin >> N;

  while(N>=25){
    N-=25;
    M++;
  }
  while(M>=4){
    M-=4;
    L++;
  }
  while(L>=10){
    L-=10;
    P++;
  }
  
  cout << P+L+M+N << endl;
  return 0;
}