Find Non - Repeating Numbers

You are given an array of integers ‘A’ having ‘N’ number of elements. It is given that all the numbers in the array occur twice except the two numbers that appear only one time. You need to find those two non-repeating numbers.

For Example:

If the given array is [ 4, 7, 3, 2, 7, 2 ], you have to find ‘4’ and ‘3’ as 4 and 3 occur one time, and the rest of the elements ( 7 and 2 ) are occurring twice.

Input Format:

The first line contains a single integer T representing the number of test cases.      

The first line of each test case contains a single integer ‘N’, denoting the number of elements in the array.

The second line of each test case contains ‘N’ space-separated integers denoting the elements of the given array.

Output Format:

For each test case, print two space-separated integers that denote the two non-repeating numbers in the given array.

Print the output of each test case in a new line.

Note:

You do not need to print anything. It has already been taken care of. Just implement the given function.

Constraints:

1 <= T <= 10
4 <= N <= 10^5
1 <= A[i] <= 10^5

Time Limit: 1 sec