Rotate Image In Place By 90 Degrees Clockwise
Rotate a matrix by 90 degrees clockwise in place. Transpose the matrix, then reverse each row. Example: [[1,2,3],[4,5,6],[7,8,9]] -> [[7,4,1],[8,5,2],[9,6,3]]. Time complexity: O(n^2), space complexity: O(1).
Top Interview 150
The Rotate Image problem involves rotating an n×n matrix by 90 degrees clockwise, in place. Let’s solve LeetCode 48: Rotate Image step by step.
🚀 Problem Description
Given an n×n matrix:
Rotate the matrix in place by 90 degrees clockwise.
In-place means modifying the original matrix without allocating extra space for another matrix.
💡 Examples
Example 1
Input: matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
Output: [[7, 4, 1], [8, 5, 2], [9, 6, 3]]
Example 2
Input: matrix = [[5, 1, 9, 11], [2, 4, 8, 10], [13, 3, 6, 7], [15,...