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Grokking the Coding Interview Patterns in Python

Solution: Rotate Image

Explore how to rotate a square matrix 90 degrees clockwise in place without extra space. Understand the algorithm that swaps groups of four cells iteratively and analyze its time and space complexities for efficient matrix transformation.

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Statement

Given an n×nn \times n matrix, rotate the matrix 90 degrees clockwise. The performed rotation should be in place, i.e., the given matrix is modified directly without allocating another matrix.

Note: The function should only return the modified input matrix.

Constraints:

  • matrix.length == matrix[i].length
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