#include <iostream>

struct V {
    int x;
    V(int t) : x(t) {}
};

struct A : virtual V {
    int x;
    A(int t) : V(3 * t), x(3 * t) {}
};

struct B : virtual V {
    int x;
    B(int t) : V(5 * t), x(5 * t) {}
};

struct C : A, B {
    C(int t) : V(t), A(t), B(t) {}

    void show_x() {
        std::cout << "V::x = " << V::x << std::endl;
    }
};

int main() {
    C c(1);
    c.show_x();
    return 0;
}