Given an array of integers. Check whether it contains a triplet that sums up to zero. 

The first line of input contains an integer T, denoting the number of test cases. Then T test cases follow. The first line of each test case contains an integer N, denoting the number of elements in array. The second line of each test case contains N space separated values of the array.

For each test case, output will be 1 if triplet exists else 0.

Your Task:
You don't need to read input or print anything. Your task is to complete the boolean function findTriplets() which takes the array arr[] and the size of the array (n) as inputs and returns True if the given array has a triplet with zero sum and False otherwise. 

Expected Auxiliary Space: O(1)
Expected Time Complexity: O(n2)

1 <= T <= 100
1 <= N <= 104

-106 <= Ai <= 106


0 -1 2 -3 1
1 2 3


Testcase 1:
0, -1 and 1 forms a triplet with sum equal to 0.
Testcase 2: No triplet exists which sum to 0.


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

Contributor: Saksham Raj Seth, Harshit Sidhwa
Author: saksham seth

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