>>277
#include <iostream>
#include <cmath>

class VECTOR2
{
    double x, y;
public:
    VECTOR2(double xs, double ys) : x(xs), y(ys) {}
    void print() const{std::cout << '(' << x << ',' << y << ')';}
    double abs() const{return std::sqrt(x * x + y * y);}
    friend const VECTOR2 operator+(const VECTOR2& lhs, const VECTOR2& rhs)
    {
        return VECTOR2(lhs.x + rhs.x, lhs.y + rhs.y);
    }
};