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

    def __str__(self):
        return f'{self.x} {self.y}\n'

    def __lt__(self, other):
        return self.x < other.x if not self.x == other.x else self.y < other.y

try:
    while True:
        a = int(input())
        q = []
        for i in range(a):
            z = [int(i) for i in input().split(' ')]
            q.append(point(z[0], z[1]))
        q.sort()
        print(''.join(str(i) for i in q), end="")
except EOFError:
    pass

參考了#21547之後然後用python寫出來的東西

僅供參考