AI代码解释 classSolution:defrotate(self,matrix:List[List[int]])->None:""" Do notreturnanything,modify matrixin-place instead.""" n=len(matrix)# 注意一下范围和下标即可foriinrange(n//2):forjinrange(i,n-1-i):matrix[i][j],matrix[j][n-1-i],matrix[n-1-i][n-1-j],matrix[n-1...
matrix[i].reverse()#然后将矩阵的每一行翻转returnmatrix 解题思路2:首先沿着副对角线翻转一次,然后沿着水平中线翻转一次,就可以得到所要求的矩阵了。时间复杂度O(n^2),空间复杂度O(1) classSolution:#@param matrix, a list of lists of integers#@return a list of lists of integersdefrotate(self, matrix...
You are given annxn2D matrix representing an image. Rotate the image by 90 degrees (clockwise). Follow up: Could you do this in-place? 分析: 二维数组a[n][n]顺时针旋转90度,要解决这个问题,无疑,第一件事儿就是找规律。 当n=1时,不用动了。 当n=2时, 旋转之后变为 有: a[0][0] =...
classSolution{public:voidrotate(vector<vector<int>>&matrix){int n=matrix.size();for(int i=0;i<(n+1)/2;i++)// 行的遍历范围{for(int j=0;j<n/2;j++)// 列的遍历范围{// 由于是旋转赋值,所以temp记录的是最后一个位置上的元素//然后逆时针进行覆盖,见上面的图。int temp=matrix[n-1-j...
Rotate the image by 90 degrees (clockwise). Follow up: Could you do this in-place? class Solution { public: void rotate(vector<vector<int> > &matrix) { //方法1:tempMatrix[j][n-1-i] = matrix[i][j]; 置换 //方法2:先对角线翻转,再中间线上下翻转 ...
LeetCode 48. Rotate Image n x n Rotate the image by 90 degrees (clockwise). Follow up: Could you do this in-place? class Solution { public: void rotate(vector<vector<int>>& matrix) { int length = matrix[0].size(); for(int i = 0; i < length / 2; i ++){...
48. Rotate Image You are given an n x n 2D matrix representing an image, rotate the image by 90 degrees (clockwise). You have to rotate the image in-place, which means you have to modify the input 2D matrix directly. DO NOT allocate another 2D matrix and do the rotation. Example 1...
You are given annxn2Dmatrixrepresenting an image, rotate the image by 90 degrees (clockwise). You have to rotate the imagein-place, which means you have to modify the input 2D matrix directly.DO NOTallocate another 2D matrix and do the rotation. ...
27.rotate-image You are given annxn2D matrix representing an image. Rotate the image by 90 degrees (clockwise). Follow up: Could you do this in-place? Code:Solution 28. unique-paths A robot is located at the top-left corner of amxngrid (marked 'Start' in the diagram below). ...
You are given an n x n 2D matrix representing an image. Rotate the image by 90 degrees (clockwise). You have to rotate the image in-place, which means you have to modify the input 2D matrix directly. DO NOT allocate another 2D matrix and do the rotation. ...