Given an array a of N positive and negative numbers. Find if there is a subarray (of size at-least one) with 0 sum.
The first line of input contains an integer T denoting the number of test cases. Then T test cases follow. Each test case contains an integer n denoting the size of the array. The next line contains N space separated integers forming the array.
Print "Yes" (without quotes) if there exist a subarray of size at least one with sum equal to 0 or else print "No" ( without quotes).
This is a function problem. You only need to complete the function subArrayExists() that takes array and n as parameters and returns true or false.
1 <= T <= 100
1 <= N <= 104
-105 <= a[i] <= 105
4 2 -3 1 6
4 2 0 1 6
Testcase 1: 2, -3, 1 is the subarray with sum 0.
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