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Vector2D(double x=0,double y=0):x(x),y(y){} Vector2D operator+(const Vector2D& o) const {return {x+o.x,y+o.y};} Vector2D operator-(const Vector2D& o) const {return {x ...

Vector2D(double x = 0, double y = 0) : x(x), y(y) {} Vector2D operator-(const Vector2D& other) const { return Vector2D(x - other.x, y - other.y); } Vector2D operator+ ...