题解 | #重载运算#

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

    def __str__(self):
        print("({}, {})".format(self.x, self.y))

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

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

c1 = Coordinate(x1, y1)
c2 = Coordinate(x2, y2)

c1.__add__(c2).__str__()