public class SimpleVector {

  static int x, y;

  public SimpleVector() {
    x = 0;
    y = 0;
  }

  public SimpleVector(int a, int b) {
    x = a;
    y = b;
  }

  public static SimpleVector add_two_vectors(SimpleVector v1, 
					     SimpleVector v2) {
    
    return new SimpleVector(v1.x + v2.x, v1.y + v2.y);

  }

  public String toString() {
    return ("(" + x + ", " + y + ")");
  }
  
}