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

int main() {
	int a, b, c, n = 10, sz = 0; cin >> a >> b >> c;
    if (a+b+c < 10) {
        cout << -1;
        return 0;
    }
	if (a > n-1) {
        cout << 3000;
        return 0;
    } else {
        n -= a;
        sz += a*300;
        if (b > n-1) {
            cout << sz + n*350;
            return 0;
        } else {
        n -= b;
        sz += b*350;
        cout << sz + n*400;
        }
    }
}