시간 제한메모리 제한제출정답맞힌 사람정답 비율
1 초 128 MB112364583705092652.102%

문제

X대학 M교수님은 프로그래밍 수업을 맡고 있다. 교실엔 학생이 30명이 있는데, 학생 명부엔 각 학생별로 1번부터 30번까지 출석번호가 붙어 있다.

교수님이 내준 특별과제를 28명이 제출했는데, 그 중에서 제출 안 한 학생 2명의 출석번호를 구하는 프로그램을 작성하시오.

입력

입력은 총 28줄로 각 제출자(학생)의 출석번호 n(1 ≤ n ≤ 30)가 한 줄에 하나씩 주어진다. 출석번호에 중복은 없다.

출력

출력은 2줄이다. 1번째 줄엔 제출하지 않은 학생의 출석번호 중 가장 작은 것을 출력하고, 2번째 줄에선 그 다음 출석번호를 출력한다.

예제 입력 1

3
1
4
5
7
9
6
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

예제 출력 1

2
8

예제 입력 2

9
30
6
12
10
20
21
11
7
5
28
4
18
29
17
19
27
13
16
26
14
23
22
15
3
1
24
25

예제 출력 2

2
8
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