Sum of Two Numbers Represented as Arrays

Given two numbers in the form of two arrays where each element of the array represents a digit, calculate the sum of these two numbers and return this sum as an array.

Explanation:

You are provided with two arrays, A[] and B[], representing two numbers with lengths 'N' and 'M' respectively. The task is to add these two numbers and provide the sum in array format.

Input:

The first line of input indicates the integer T, which denotes the number of test cases.
The first line of each test case contains two space-separated integers, 'N' and 'M', representing the sizes of the two arrays.
The second line contains 'N' space-separated integers indicating the elements of the first array.
The third line contains 'M' space-separated integers indicating the elements of the second array.

Output:

A single line for each test case that contains space-separated digits describing the sum of the two numbers A and B.

Example:

Input:
1
3 3
4 5 1
3 4 5
Output:
7 9 6

Explanation: The integer represented by A[] = {4, 5, 1} is 451 and B[] = {3, 4, 5} is 345. Their sum is 796, which should be returned as {7, 9, 6}.

Constraints:

• 1 <= T <= 10^2
• 1 <= N, M <= 10^4
• 0 <= A[i], B[i] <= 9
• Time Limit: 1 sec

Note:

1. Each array's first index represents the most significant digit of the number.
2. Numbers do not contain leading zeros, and the resultant sum should also be free of leading zeros.