class Vector {
//a
private:
float size;
long long startingIndex;
double* data;

//b
Vector(float size, long long startingIndex) : size{size}, startingIndex{startingIndex}
{
if(size<1)
data = nullptr;
else
data  = new double(size);
}

//c
~Vector() {
        if (nullptr != data)
        {
            delete data;
        }
    }
//d konstruktor kopiujacy
Vector(const Vector& x){
    this->size = x.size;
    this->startingIndex = x.startingIndex;

     if (size > 0) {
            data = new double[size]();
            copy(x.data, x.data + x.size, this->data);
        }
        else
            data = nullptr;

}

//f  para operatorow []
 double& operator[](const size_t index) {
        if (startingIndex + index > size - 2) {
            throw std::out_of_range("out of range");
        }
        return data[startingIndex + index];
    }

    const double& operator[](const size_t index) const {
        if (startingIndex + index > size - 2) {
            throw std::out_of_range("out of range");
        }
        return data[startingIndex + index];
    }

//g     operator ()
float operator()() const {
        return size;
    }

};