Matrix Spiral Traversal

Given an `m x n` matrix, return all elements of the `matrix` in spiral order. ### Constraints - `m == matrix.length` - `n == matrix[i].length` - `1 <= m, n <= 100` - `-100 <= matrix[i][j] <= 100` ### Input Format Each line represents a row of the matrix containing space-separated integers. ### Output Format Print the elements in spiral order separated by spaces.