| | | 1 | | // -------------------------------------------------------------------------------- |
| | | 2 | | // Copyright (C) 2025 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 | | using System.Text; |
| | | 13 | | |
| | | 14 | | namespace LeetCode.Algorithms.ReverseString2; |
| | | 15 | | |
| | | 16 | | /// <inheritdoc /> |
| | | 17 | | public class ReverseString2WithStringBuilder : IReverseString2 |
| | | 18 | | { |
| | | 19 | | /// <summary> |
| | | 20 | | /// Time complexity - O(n) |
| | | 21 | | /// Space complexity - O(n) |
| | | 22 | | /// </summary> |
| | | 23 | | /// <param name="s"></param> |
| | | 24 | | /// <param name="k"></param> |
| | | 25 | | /// <returns></returns> |
| | | 26 | | public string ReverseStr(string s, int k) |
| | 2 | 27 | | { |
| | 2 | 28 | | var reverseStringBuilder = new StringBuilder(); |
| | | 29 | | |
| | 2 | 30 | | var reverse = true; |
| | 2 | 31 | | var sIndex = 0; |
| | | 32 | | |
| | 8 | 33 | | while (sIndex < s.Length) |
| | 6 | 34 | | { |
| | | 35 | | IEnumerable<char> charArray; |
| | | 36 | | |
| | 6 | 37 | | if (reverse) |
| | 3 | 38 | | { |
| | 3 | 39 | | charArray = s.Skip(sIndex).Take(k).Reverse(); |
| | | 40 | | |
| | 3 | 41 | | reverse = false; |
| | 3 | 42 | | } |
| | | 43 | | else |
| | 3 | 44 | | { |
| | 3 | 45 | | charArray = s.Skip(sIndex).Take(k); |
| | | 46 | | |
| | 3 | 47 | | reverse = true; |
| | 3 | 48 | | } |
| | | 49 | | |
| | 40 | 50 | | foreach (var c in charArray) |
| | 11 | 51 | | { |
| | 11 | 52 | | reverseStringBuilder.Append(c); |
| | 11 | 53 | | } |
| | | 54 | | |
| | 6 | 55 | | sIndex += k; |
| | 6 | 56 | | } |
| | | 57 | | |
| | 2 | 58 | | return reverseStringBuilder.ToString(); |
| | 2 | 59 | | } |
| | | 60 | | } |