링크 : https://www.acmicpc.net/problem/10989
내장함수 .sort()
보다 빠른건 배열 생성이다!
import sys
input = sys.stdin.readline
n = int(input())
array = [0]*10001
for i in range(n):
array[int(input())] += 1
for i in range(10001):
if array[i] != 0:
for j in range(array[i]):
print(i)