[백준 11651번] 좌표 정렬하기 2

import sys
input = sys.stdin.readline

n = int(input())

array = []

for i in range(n):
  x, y = map(int,input().split())
  array.append((x,y))

array.sort(key=lambda x:x[0])
array.sort(key=lambda x:x[1])

for i in array:
  print(f"{i[0]} {i[1]}")