Package g1901_2000.s1914_cyclically_rotating_a_grid

Class Solution

  • public class Solution
extends Object
    1914 - Cyclically Rotating a Grid.

    Medium

    You are given an m x n integer matrix grid, where m and n are both even integers, and an integer k.

    The matrix is composed of several layers, which is shown in the below image, where each color is its own layer:

    A cyclic rotation of the matrix is done by cyclically rotating each layer in the matrix. To cyclically rotate a layer once, each element in the layer will take the place of the adjacent element in the counter-clockwise direction. An example rotation is shown below:

    Return the matrix after applying k cyclic rotations to it.

    Example 1:

    Input: grid = [[40,10],[30,20]], k = 1

    Output: [[10,20],[40,30]]

    Explanation: The figures above represent the grid at every state.

    Example 2:

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

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

    Explanation: The figures above represent the grid at every state.

    Constraints:

    • m == grid.length
    • n == grid[i].length
    • 2 <= m, n <= 50
    • Both m and n are even integers.
    • 1 <= grid[i][j] <= 5000
    • 1 <= k <= 109

    • Constructor Detail

      • Solution

        public Solution()

    • Method Detail

      • rotateGrid

        public int[][] rotateGrid​(int[][] grid,
                          int k)