Spiral Matrix
Android app by Vagdiyo Academy. Education · Vagdiyo Academy
- Store rating
- Unknown
- Store rating count
- Unknown
- Download price
- Free to download
- In-app purchases
- Not listed in captured metadata
- Version
- 2.0.0
- Listing last refreshed
- 2026-09-12
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Store description excerpt
A spiral matrix is a 2D grid (typically m × n) that is either filled with values or traversed in a clockwise (or counter-clockwise) spiral order, beginning at the top-left corner and proceeding layer by layer toward the center. The traversal follows the sequence: left → right, then top → bottom, right → left, and bottom → top, tightening the boundary after each side. Common variations include generating a matrix with numbers 1 to m×n in spiral order, or extracting elements from an existing matrix spirally (e.g., LeetCode #54). The algorithm typically uses four boundary pointers—top, bottom, left, right—and terminates when they cross. Time complexity is O(mn); space complexity is O(1) (excluding output). Spiral matrices are used in image processing, memory layout optimization, mathematical visualization, and coding interviews.
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