You are given an n x n 2D matrix representing an image.

Rotate the image by 90 degrees (clockwise).

Follow up:

Could you do this in-place?

class Solution {public:	void rotate(std::vector
     
      
        > &matrix) {		int n = matrix.size();		int m = n / 2;         		for(int i = 0; i < m; i++)		{			for(int j = i; j < n - 1 - i; j++)			{           				int temp = matrix[j][i];   				matrix[j][i] = matrix[n - 1 - i][j];				matrix[n - 1 - i][j] = matrix[n - 1 - j][n - 1 - i];				matrix[n - 1 - j][n - 1 - i] = matrix[i][n - 1 - j];				matrix[i][n - 1 - j] = temp;			}		}	}};
      
     

版权声明：本文博客原创文章，博客，未经同意，不得转载。