int total = 0;
    int sum = 0;
    for (int i1 = 0; sum + i1 <= 15; ++i1) {
        sum += i1;
        for (int i2 = 0; sum + i2 <= 15; ++i2) {
            sum += i2;
            for (int i3 = 0; sum + i3 <= 15; ++i3) {
                sum += i3;
                for (int i4 = 0; sum + i4 <= 15; ++i4) {
                    sum += i4;
                    for (int i5 = 0; sum + i5 <= 15; ++i5) {
                        sum += i5;
                        int i6 = 15 - sum;;

                        ++total;

                        sum -= i5;
                    }
                    sum -= i4;
                }
                sum -= i3;
            }
            sum -= i2;
        }
        sum -= i1;
    }
    cout << total;