【LeetCode】 107 旋轉圖像

題目：

解題思路：

暴力

https://leetcode-cn.com/problems/rotate-image/solution/xuan-zhuan-tu-xiang-by-leetcode-solution-vu3m/

代碼：

public class LC102 {

    public void rotate(int[][] matrix) {
        int n = matrix.length;
        for (int i = 0; i < n / 2; ++i) {
            for (int j = 0; j < (n + 1) / 2; ++j) {
                int temp = matrix[i][j];
                matrix[i][j] = matrix[n - j - 1][i];
                matrix[n - j - 1][i] = matrix[n - i - 1][n - j - 1];
                matrix[n - i - 1][n - j - 1] = matrix[j][n - i - 1];
                matrix[j][n - i - 1] = temp;
            }
        }
    }

    public static void main(String[] args) {
        int[][] arr = new int[][]{{1,2,3,4},{5,6,7,8},{9,10,11,12},{13,14,15,16}};
        LC102 lc102 = new LC102();
        lc102.rotate(arr);
        for (int i = 0; i < arr.length; i++) {
            for (int i1 = 0; i1 < arr[0].length; i1++) {
                System.out.print(arr[i][i1]+" ");
            }
        }
    }
}