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Given two array A[0….N-1] and B[0….M-1] of size N and M respectively, representing two numbers such that every element of arrays represent a digit. For example, A[] = { 1, 2, 3} and B[] = { 2, 1, 4 } represent 123 and 214 respectively. The task is to find the sum of both the numbers.

**Example 1:**

**Input :** A[] = {1, 2}, B[] = {2, 1}
**Output :** 33
**Explanation:**
N=2, and A[]={1,2}
M=2, and B[]={2,1}
Number represented by first array is 12.
Number represented by second array is 21
Sum=12+21=33

**Example 2:**

**Input :** A[] = {9, 5, 4, 9}, B[] = {2, 1, 4} **
Output :** 9763

**Your Task:**

This is a function problem. The input is already taken care of by the driver code. You only need to complete the function **calc_Sum()** that takes an array **(a)**, sizeOfArray **(n)**, an array **(b), **sizeOfArray **(m),** and return the sum . The driver code takes care of the printing.

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

**Expected Auxiliary Space:** O(N + M).

**Constraints:**

2 ≤ N ≤ 10^{5}

2 ≤ M ≤ 10^{5}

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Add two numbers represented by two arrays

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