g0001_0100.s0048_rotate_image

Class Solution

java.lang.Object

g0001_0100.s0048_rotate_image.Solution

public class Solution
extends Object

48 - Rotate Image.

Medium

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:

Input: matrix = 1,2,3],[4,5,6],[7,8,9

Output: 7,4,1],[8,5,2],[9,6,3

Example 2:

Input: matrix = 5,1,9,11],[2,4,8,10],[13,3,6,7],[15,14,12,16

Output: 15,13,2,5],[14,3,4,1],[12,6,8,9],[16,7,10,11

Example 3:

Input: matrix = 1

Output: 1

Example 4:

Input: matrix = 1,2],[3,4

Output: 3,1],[4,2

Constraints:

• matrix.length == n
• matrix[i].length == n
• 1 <= n <= 20
• -1000 <= matrix[i][j] <= 1000

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
void	rotate(int[][] matrix)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Solution

public Solution()

Method Detail

rotate

public void rotate(int[][] matrix)