Missing number in array
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  Difficulty: Basic   Marks: 1

Given an array C of size N-1 and given that there are numbers from 1 to N with one element missing, the missing number is to be found.

Input:
The first line of input contains an integer T denoting the number of test cases. For each test case first line contains N(size of array). The subsequent line contains N-1 array elements.

Output:
Print the missing number in array.

Constraints:
1 ≤ T ≤ 200
1 ≤ N ≤ 107
1 ≤ C[i] ≤ 107

Example:
Input:
2
5
1 2 3 5
10
1 2 3 4 5 6 7 8 10

Output:
4
9

Explanation:
Testcase 1: Given array : 1 2 3 5. Missing element is 4.

** For More Input/Output Examples Use 'Expected Output' option **

Author: rajatjha


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