백준 파이썬 5597 과제 안 내신 분..?

https://www.acmicpc.net/problem/5597

5597번: 과제 안 내신 분..?

Code

students = []

for i in range(1, 28 + 1):
    students.append(int(input()))

for target in range(1, 30 + 1):
    if target not in students:
        print(target)