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Given an array containing **N** integers and a positive integer **K**, find the length of the longest sub array with sum of the elements divisible by the given value **K**.

**Example 1:**

**Input:
**A[] = {2, 7, 6, 1, 4, 5}
K = 3
**Output:** 4
**Explanation:**The subarray is {7, 6, 1, 4}
with sum 18, which is divisible by 3.

**Example 2:**

**Input:
**A[] = {-2, 2, -5, 12, -11, -1, 7}
K = 3
**Output:** 5
**Explanation:
**The subarray is {2,-5,12,-11,-1} with
sum -3, which is divisible by 3.

**Your Task:**

The input is already taken care of by the driver code. You only need to complete the function **longSubarrWthSumDivByK()** that takes an array **(arr)**, sizeOfArray **(n)**, positive integer **K**, and return the length of the longest subarray which has sum divisible by **K**. The driver code takes care of the printing.

**Expected Time Complexity:** O(N).

**Expected Auxiliary Space: **O(N).â€‹

**Constraints:**

1<=N,K<=10^{6}

-10^{5}<=A[i]<=10^{5}

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Longest subarray with sum divisible by K

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