#include <iostream>
#include <cmath>
using namespace std;

    class Vector{
    private:
        int *v;
    public:
        int dim=0;
        Vector(int n){
            dim=n;
            v=new int[dim];
            for(int i=0;i<dim;i++)
                *(v+i)=0;
        }
        ~Vector(){
            delete[] v;
        }

        int * get(){
            return v;
        }

        double length(){
            double length=0;
            for(int i=0;i<dim;i++){
                length+=pow(*(v+i),2);
            }
            return sqrt(length);
        }

        void set(int index,int value){
            if(index < dim){
                *(v+index)=value;
            }
        }

        void Display_Coords(){
            for(int i=0;i<dim;i++)
                cout<<*(v+i)<<" ";
            cout << endl;
        }

        friend Vector & operator+(Vector &left,Vector &right);
        Vector & operator*(int A){
            Vector * temp= new Vector(this->dim);
            for(int i=0;i<dim;i++)
                temp->set(i,*(v+i)*A);
            return *temp;
        }
    };
Vector & operator+(Vector &left, Vector &right){
    if(left.dim==right.dim){
        Vector * temp = new Vector(left.dim);
        int *lp=left.get();
        int *rp=right.get();
        for(int i=0;i<temp->dim;i++){
            temp->set(i,*(lp+i)+*(rp+i));
        }
        return *temp;
    }
}
int main(){
    Vector v1(2);
    Vector v2(2);
    v1.set(0,1);
    v1.set(1,2);
    v2.set(0,3);
    v2.set(1,5);
    Vector v3=(Vector)(v1+v2);
    Vector v4=v1*44;
    cout << "V1:";
    v1.Display_Coords();
    cout << "V2:";
    v2.Display_Coords();
    cout << "V3:";
    v3.Display_Coords();
    cout << "V4:";
    v4.Display_Coords();
    return 0;
}