#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef string str;
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    ll a, b, c;
    cin >> a >> b >> c;
    ll total = (a * 1) + (b * 25) + (c * 100);
    ll rem = total % 1000;
    ll n100 = rem / 100;
    rem %= 100;
    ll n25 = rem / 25;
    rem %= 25;
    cout << n100 + n25 + rem << endl;
    return 0;
}