https://www.acmicpc.net/problem/11650
n = int(input())
arr = []
for _ in range(n):
nums = list(map(int, input().split()))
arr.append(nums)
arr.sort()
for num in arr:
print(num[0], num[1])
์๊ฐ
์ค๋ฆ์ฐจ์ ์ ๋ ฌ๋ง ํ๋ฉด ๋๋ ๊ฐ๋จํ ๋ฌธ์
