mediumBlind 75
Spiral Matrix
Given an m x n matrix, return all elements in spiral order Traverse: right → down → left → up → repeat inward Example: [[1,2,3],[4,5,6],[7,8,9]] => [1,2,3,6,9,8,7,4,5]
Spiral Matrix turns a simple directional walk into careful boundary bookkeeping: sweep right, down, left, and up, tightening the four edges after each pass. The edge cases worth walking by hand are rectangular matrices where the final sweep is a single row or column.
Arrays & HashingSimulation
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1Spiral Matrix Traversalmedium
Based onLeetCode