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Missing number in shuffled array
##### Submissions: 2248   Accuracy: 35.3%   Difficulty: Basic   Marks: 1

Given an array A of size N. The contents of A are copied into another array B and numbers are shuffled. Also, one element is removed from B. The task is to find the missing element.

Input:
The first line of input contains an integer T denoting the number of test cases. Then T test cases follow. Each testcase contains three lines of input. The first line contains an integer N, where N is the size of array. The second line contains N space separated integers denoting elements of the array A[ ]. The third line contains N-1 space separated integers denoting elements of the array B[ ].

Output:
For each testcase, print the missing number.

Constraints:
1 <= T <= 1000
1 <= N <= 107
1 <= A, B <= 1010

Example:
Input:

2
5
1 3 5 6 9
1 9 6 5
3
1 2 3
1 3

Output:
3
2

Explanation:
Testcase1:
3 is the only element missing from B.

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

Contributor: Sujnesh Mishra
Author: sujnesh

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