// kodkupa 1 feladat.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>

using namespace std;

int a, b, c, db, osszeg;

int main()
{
    cin >> a >> b >> c;
    if (a + b + c < 10)
    {
        cout << -1;
    }
    else
    {
        db = 0;
        while (a > 0 && db < 10)
        {
            osszeg = osszeg + 300;
            db++;
            a--;
        }
        while (b > 0 && db < 10)
        {
            osszeg = osszeg + 350;
            db++;
            b--;
        }
        while (c > 0 && db < 10)
        {
            osszeg = osszeg + 400;
            db++;
            c--;
        }
        cout << osszeg;
    }
    return 0;
}

// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu

// Tips for Getting Started: 
//   1. Use the Solution Explorer window to add/manage files
//   2. Use the Team Explorer window to connect to source control
//   3. Use the Output window to see build output and other messages
//   4. Use the Error List window to view errors
//   5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
//   6. In the future, to open this project again, go to File > Open > Project and select the .sln file