题解 | #重载运算#

class Coordinate(object):
    
    def __init__(self, x, y):
        self.x = x
        self.y = y

    def __str__(self):
        return f"({self.x}, {self.y})"  # 必须用f格式化输出，否则返回的只是内存地址，而不是数值本身

    def __add__(self, other):
        return Coordinate(self.x + other.x, self.y + other.y)

x1, y1 = list(map(int, input().split()))
x2, y2 = list(map(int, input().split()))

c1 = Coordinate(x1, y1)
c2 = Coordinate(x2, y2)
c3 = c1.__add__(c2)
print(c3.__str__())