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Problems > The Two Missing Numbers

The Two Missing Numbers

Difficulty: 1400 2000 ms 128 MB

math

The list should contain 1..N but exactly TWO numbers are missing. Print them in increasing order.

Input: the first line has N; the second line has the N−2 remaining numbers.

Output: the two missing numbers, ascending.

Constraints:

  • 3 ≤ N ≤ 105

Sample Tests

Input 1
5
2 4 5
Output 1
1 3
Input 2
3
2
Output 2
1 3

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