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Grokking the Coding Interview Patterns in C++

Solution: Spiral Matrix II

Understand how to generate an n by n spiral matrix by filling the matrix layer by layer, moving right, down, left, and up sequentially. This lesson helps you grasp the traversal logic, implement the solution efficiently in C++, and appreciate the O(n²) time complexity and constant space usage.

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Statement

Given a positive integer n, create an n×nn \times n, matrix where the elements are sequential integers from 11 to n2n^2, arranged in a spiral pattern.

Constraints:

  • 1 ≤\leqn ≤\leq2020 ...