Given an array having both positive an negative integers. The task is to complete the function maxLen() which returns the length of maximum subarray with 0 sum. The function takes two arguments an array A and n where n is the size of the array A.
The first line of input contains an element T denoting the number of test cases. Then T test cases follow. Each test case consist of 2 lines. The first line of each test case contains a number denoting the size of the array A. Then in the next line are space separated values of the array A.
For each test case output will be the length of the largest subarray which has sum 0.
Sinec this is a functional problem you don't have to worry about input, you just have to complete the function maxLen().
1 <= T <= 100
1 <= N <= 100
-1000 <= A <= 1000
15 -2 2 -8 1 7 10 23
Testcase 1: In the above test case the largest subarray with sum 0 will be -2 2 -8 1 7.
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