class Coordinate(): def __init__(self,x,y): self.x = x self.y = y def __str__(self): return f"{(self.x,self.y)}" # 只要一个单引号 def __add__(self,other): return Coordinate(self.x + other.x,self.y + other.y) # 运算符重载 x1,y1 = list(map(int,input().split(...