/*
 * AC
 */
class Solution {
    public void rotate(int[][] matrix) {
        int row = matrix.length;
        if (row == 0) {
            return;
        }

        int col = matrix[0].length;
        if (col == 0) {
            return;
        }

        int temp;
        for (int i = 0; i < row / 2; i++) {
            for (int j = 0; j < col; j++) {
                temp = matrix[i][j];
                matrix[i][j] = matrix[row - 1 - i][j];
                matrix[row - 1 - i][j] = temp;
            }
        }

        for (int i = 0; i < row; i++) {
            for (int j = i; j < col; j++) {
                temp = matrix[i][j];
                matrix[i][j] = matrix[j][i];
                matrix[j][i] = temp;
            }
        }

        return;
    }
}