class X
{
private:
    int* data;
public:
    X():
        data(new int[1000000])
    {}
    ~X()
    {
        delete [] data;
    }
    X(const X& other):
        data(new int[1000000])
    {
        std::copy(other.data,other.data+1000000,data);
    }
    X(X&& other):
        data(other.data)
    {
        other.data=nullptr;
    }
};