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Grokking the Coding Interview Patterns in C++

Solution: Rotate Image

Explore how to rotate a square matrix 90 degrees clockwise in place by grouping four cells and swapping their values. This lesson helps you understand the step-by-step algorithm, implement it in code, and analyze its time and space complexity for efficient matrix operations.

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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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