#include <algorithm>
#include <cmath>
#include <cstdio>
#include <deque>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <vector>

using namespace std;

typedef long long ll;

#define MOD 1000000007

int main() {
  int l, m, n;
  cin >> l >> m >> n;
  int t = n / 25;
  m += t;
  n -= 25 * t;
  t = m / 4;
  l += t;
  m -= 4 * t;
  t = l / 10;
  l -= 10 * t;
  cout << l + m + n << endl;
  return 0;
}