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] =...
You are given annxn2D matrix representing an image. Rotate the image by 90 degrees (clockwise). Follow up: Could you do this in-place? 解题思路1:先将矩阵转置,然后将矩阵的每一行翻转,就可以得到所要求的矩阵了。为便于理解,制作了如下示意图. Figure 1: Illustration of transpose operation. Only ...
A. clockwise B. counterclockwise C. forward D. backward 相关知识点: 试题来源: 解析 A。本题考查旋转方向的词汇。A 选项“clockwise”表示顺时针,B 选项“counterclockwise”表示逆时针,C 选项“forward”表示向前,D 选项“backward”表示向后。根据常识,正方形通常是顺时针旋转 90 度,所以选 A。反馈...
The figure rotated 90 degrees clockwise. What kind of transformation is this? A. reflection B. translation C. rotation D. dilation 相关知识点: 试题来源: 解析 C。本题明确提到图形顺时针旋转 90 度,这是旋转的变换,选 C“rotation”。A 选项“reflection”是反射;B 选项“translation”是平移;D ...
The square is rotated 90 degrees clockwise. What is the new position of the square? A. on the left B. on the right C. above D. below 相关知识点: 试题来源: 解析 B。本题考查对图形旋转后的位置描述。“rotated 90 degrees clockwise”表示顺时针旋转 90 度,通常旋转后会在原来位置的右侧。
Rotate the image by 90 degrees (clockwise). Note: 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: Giveninput matrix= ...
Rotate Image 二维数组旋转90度 Rotate Image You are given an 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) { //方法1:tempMatrix[j][n-1-i] = matrix[i][j]; 置换...
You are given annxn2D matrix representing an image. Rotate the image by 90 degrees (clockwise). Follow up: Could you do this in-place? 简单的说就是给出一个n*n的二维数组,然后把这个数组进行90度顺时针旋转,而且不能使用额外的存储空间。
The shape was rotated 90 degrees clockwise. Which of the following is the correct description? A. It moved to the right. B. It turned upside down. C. It changed its position horizontally. D. It changed its orientation. 相关知识点: ...
I write a function to rotate a matrix by 90 degrees clockwise, this function works on a matrix of specific size, for example, it rotates a 4*4 matrix of integers in the following code. The function makes one more copy of the original matrix, how is the efficiency? Can the copy be sa...