Why does this in-place matrix rotation corrupt values on the inner layer?

WaffleFries
Fri, 03 Apr 2026 22:39:16 +0000

Another clean way to visualize it is as a grid instead of a flat list:text Before: 1 2 3 4 5 6 7 8 9 After 90° clockwise: 7 4 1 8 5 2 9 6 3 That tradeoff helps readability more than showing the raw traversal order, which is usually better once you start checking the inner-layer index math.