https://www.acmicpc.net/problem/2750 N = int(input())arr = []for i in range(0, N): arr.append(int(input()))arr.sort()for i in arr: print(i) * arr.sort()의 return값은 None이다. arr = [1, 4, 3, 2]arr2 = arr.sort()print(arr2) # None * 기억하기arr = [1, 4, 3, 2]print(arr.sort()) # Nonearr.sort() print(arr) # [1, 2, 3, 4]arr = [1, 4, 3, 2]print(sorted(arr)) # [1, 2, 3, 4]print(arr) # [1, 4, 3, 2]..