point2d

typedef long long ftype;

struct point2d {

    ///We can declear as :
    /// point2d a (2, 3, 5);

    ftype x, y;
    point2d() {}

    point2d(ftype x, ftype y): x(x), y(y) {}

    point2d& operator+=(const point2d &t) {
        x += t.x;
        y += t.y;
        return *this;
    }

    point2d& operator-=(const point2d &t) {
        x -= t.x;
        y -= t.y;
        return *this;
    }

    point2d& operator*=(ftype t) {
        x *= t;
        y *= t;
        return *this;
    }

    point2d& operator/=(ftype t) {
        x /= t;
        y /= t;
        return *this;
    }

    point2d operator+(const point2d &t) const {
        return point2d(*this) += t;
    }

    point2d operator-(const point2d &t) const {
        return point2d(*this) -= t;
    }

    point2d operator*(ftype t) const {
        return point2d(*this) *= t;
    }

    point2d operator/(ftype t) const {
        return point2d(*this) /= t;
    }

};