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Given two numbers represented by two different arrays **A** and **B**. The task is to find the sum array. The sum array is an array representation of addition of two input arrays.

**Example 1:**

**Input:
**N = 3, M = 3
A[] = {5, 6, 3}
B[] = {8, 4, 2}
**Output: **1 4 0 5
**Explanation:** As 563 + 842 = 1405.

**Example 2:**

**Input:
**N = 6, M = 4
A[] = {2, 2, 7, 5, 3, 3}
B[] = {4, 3, 3, 8}
**Output: **2 3 1 8 7 1
**Explanation:** As 227533 + 4338 = 231871.

**Your Task: **

You don't need to read input or print anything. Your task is to complete the function **findSum()** which takes the array(vector) of integers **a **and **b **as parameters and returns an array denoting the answer.

**Expected Time Complexity:** O(max(N, M))

**Expected Auxiliary Space:** O(1)

**Constraints:**

1 ≤ N ≤ M ≤ 10^{6}

0 ≤ A_{i}, B_{i }≤ 9

No leading zeroes in array A and B.

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Sum of two numbers represented as arrays

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