题目:
题解:
- class Solution {
- public void rotate(int[][] matrix) {
- int n = matrix.length;
- // 水平翻转
- for (int i = 0; i < n / 2; ++i) {
- for (int j = 0; j < n; ++j) {
- int temp = matrix[i][j];
- matrix[i][j] = matrix[n - i - 1][j];
- matrix[n - i - 1][j] = temp;
- }
- }
- // 主对角线翻转
- for (int i = 0; i < n; ++i) {
- for (int j = 0; j < i; ++j) {
- int temp = matrix[i][j];
- matrix[i][j] = matrix[j][i];
- matrix[j][i] = temp;
- }
- }
- }
- }