| | | 1 | | // -------------------------------------------------------------------------------- |
| | | 2 | | // Copyright (C) 2026 Eugene Eremeev (also known as Yevhenii Yeriemeieiv). |
| | | 3 | | // All Rights Reserved. |
| | | 4 | | // -------------------------------------------------------------------------------- |
| | | 5 | | // This software is the confidential and proprietary information of Eugene Eremeev |
| | | 6 | | // (also known as Yevhenii Yeriemeieiv) ("Confidential Information"). You shall not |
| | | 7 | | // disclose such Confidential Information and shall use it only in accordance with |
| | | 8 | | // the terms of the license agreement you entered into with Eugene Eremeev (also |
| | | 9 | | // known as Yevhenii Yeriemeieiv). |
| | | 10 | | // -------------------------------------------------------------------------------- |
| | | 11 | | |
| | | 12 | | namespace LeetCode.Algorithms.FlipSquareSubmatrixVertically; |
| | | 13 | | |
| | | 14 | | /// <inheritdoc /> |
| | | 15 | | public sealed class FlipSquareSubmatrixVerticallySimulation : IFlipSquareSubmatrixVertically |
| | | 16 | | { |
| | | 17 | | /// <summary> |
| | | 18 | | /// Time complexity - O(k^2) |
| | | 19 | | /// Space complexity - O(1) |
| | | 20 | | /// </summary> |
| | | 21 | | /// <param name="grid"></param> |
| | | 22 | | /// <param name="x"></param> |
| | | 23 | | /// <param name="y"></param> |
| | | 24 | | /// <param name="k"></param> |
| | | 25 | | /// <returns></returns> |
| | | 26 | | public int[][] ReverseSubmatrix(int[][] grid, int x, int y, int k) |
| | 5 | 27 | | { |
| | 5 | 28 | | var endRow = x + k - 1; |
| | 5 | 29 | | var endColumn = y + k; |
| | | 30 | | |
| | 32 | 31 | | for (var j = y; j < endColumn; j++) |
| | 11 | 32 | | { |
| | 11 | 33 | | var left = x; |
| | 11 | 34 | | var right = endRow; |
| | | 35 | | |
| | 21 | 36 | | while (left < right) |
| | 10 | 37 | | { |
| | 10 | 38 | | (grid[left][j], grid[right][j]) = (grid[right][j], grid[left][j]); |
| | | 39 | | |
| | 10 | 40 | | left++; |
| | 10 | 41 | | right--; |
| | 10 | 42 | | } |
| | 11 | 43 | | } |
| | | 44 | | |
| | 5 | 45 | | return grid; |
| | 5 | 46 | | } |
| | | 47 | | } |