app/src/main/java/school_project/Vec2.java

@@ -26,4 +26,13 @@ public class Vec2 implements Serializable {
         }
         return false;
     }
+
+    public Vec2 add(Vec2 o){
+        return new Vec2(x + o.x, y + o.y);
+    }
+
+    @Override
+    public String toString() {
+        return "("+x+","+y+")";
+    }
 }