Matrix Spiral Order

Given a 2D matrix, return its elements in spiral order. Start from the top-left corner, traverse the outer layer in a clockwise fashion, and continue inward until all elements are traversed. Input format: - The first line contains two integers, 'n' and 'm' (number of rows and columns). - The next 'n' lines contain 'm' space-separated integers. Output format: - Print the elements in spiral order as a single line of space-separated integers. Example: Input: 3 4 1 2 3 4 5 6 7 8 9 10 11 12 Output: 1 2 3 4 8 12 11 10 9 5 6 7