#include <bits/stdc++.h>
using namespace std;

int main() {
	int a, b, c;
    cin >> a >> b >> c;

    if (a + b + c < 10) {
        cout << "-1" << endl;
    }
    else {
        int sum = 0;
        int cnt = 10;

        int aAmount = min(a, 10);

        cnt -= aAmount;
        sum += aAmount * 300;

        if (cnt) {
            int bAmount = min(b, cnt);

            cnt -= bAmount;
            sum += bAmount * 350;

            if (cnt) {
                sum += cnt * 400;
            }
        }

        cout << sum << endl;
    }
}