LeetCode Solution: 54. Spiral Matrix

The provided solution for the problem of traversing a matrix in a spiral order is well-detailed and comprehensive. Here’s a summary and analysis to ensure clarity:

Problem Statement Recap:

Given an m x n matrix, return all elements of the matrix in spiral order.

Solution Overview:

1. Initialization:

   • Determine the total number of elements (m * n) and initialize boundary pointers for top, bottom, left, and right.

2. Traversal Phases:

   • Traverse the matrix layer by layer using four phases:
     1. Top Row: Move from left to right along the current top row.
     2. Right Column: Move from top to bottom along the current right column.
     3. Bottom Row: Move from right to left along the current bottom row.
     4. Left Column: Move from bottom to top along the current left column.

3. Boundary Adjustments:

   • After completing each phase, adjust the boundary pointers inward (top++, right--, bottom--, left++) to process the next inner layer.

Detailed Steps:

1. Check for Empty Matrix:

   cpp
    
   1if (!matrix.size()

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