class Vector {
    constructor(public x: number, public y: number) {}

    copy(){
        return new Vector(this.x, this.y);
    }

    static Add(v1: Vector, v2: Vector){
        return new Vector(v1.x + v2.x, v1.y + v2.y);
    }
    static Sub(v1: Vector, v2: Vector){
        return new Vector(v1.x - v2.x, v1.y - v2.y);
    }
    static Mult(v: Vector, n: number){
        return new Vector(v.x * n, v.y * n);
    }

    add(v: Vector){
        this.x += v.x;
        this.y += v.y;
    }
    addC(x: number, y: number){
        this.x += x;
        this.y += y;
    }
    mult(n: number){
        this.x *= n;
        this.y *= n;
    }

    mag(){
        return Math.sqrt(this.x * this.x + this.y * this.y);
    }

    normalize(){
        this.mult(1 / this.mag());
    }
}