#include <bits/stdc++.h>
#define rep(i, ss, ee) for (int i = ss; i < ee; ++i)
using namespace std;

vector<unsigned> coins({1000, 100, 25, 1});

int main() {
  int L, M, N, ans;
  cin >> L >> M >> N;

  unsigned sum = (L * 100 + M * 25 + N) % 1000;

  rep(i, 1, coins.size()) {
    ans += sum / coins[i];
    sum %= coins[i];
  }

  cout << ans << endl;
  getchar();
}