#include <iostream>
#include <string>
using namespace std;

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

    int total = (100 * L) + (25 * M) + N;

    int only_coin = total % 1000;

    int answer = 0;

    int l = only_coin / 100;

    answer += l;

    only_coin -= 100 * l;

    int m = only_coin / 25;

    answer += m;

    only_coin -= 25 * m;

    answer += only_coin;

    cout << answer;
    
    return 0;
}