#include <iostream>
#include <cmath>

using namespace std;

int main()
{
    int A, B, C;
    int a=300, b=350, c=400, ar;
    int db=0, kell;

    cin >> A >> B >> C;

    if(A + B + C <10)
        cout << "-1";

    else
    {
        while (db < 10)
        {

            if (A >= 10)
                ar = 10*a;
            else if (B >= 10)
                ar = 10*b;
            else if (C >= 10)
                ar = 10*c;
            else
            {
                ar = A*a;
                db += A;
                if (B >= 10-db)
                {
                    ar = ar + (10-db)*b;
                }

            }


        }
    }

    cout << ar;
    return 0;

}