#include <bits/stdc++.h>
using namespace std;
#define REP(i,N) for(i=0;i<N;i++)
typedef long long ll;
typedef pair<int, int> P;
typedef struct{
  int first;
  int second;
  int third;
}T;

//昇順
bool comp_Se(T& l, T& r){
  return l.second < r.second;
}

int main(void){
  int T=0,L,M,N;
  cin >> L >> M >>N;
  M+=N/25;
  N-=(N/25)*25;
  L+=M/4;
  M-=(M/4)*4;
  T+=L/10;
  L-=(L/10)*10;
  cout << L+M+N << endl;
  return 0;
}