| | | 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.ZigzagConversion; |
| | | 15 | | |
| | | 16 | | /// <inheritdoc /> |
| | | 17 | | public class ZigzagConversionSimulation : IZigzagConversion |
| | | 18 | | { |
| | | 19 | | /// <summary> |
| | | 20 | | /// Time complexity - O(n) |
| | | 21 | | /// Space complexity - O(n) |
| | | 22 | | /// </summary> |
| | | 23 | | /// <param name="s"></param> |
| | | 24 | | /// <param name="numRows"></param> |
| | | 25 | | /// <returns></returns> |
| | | 26 | | public string Convert(string s, int numRows) |
| | 3 | 27 | | { |
| | 3 | 28 | | if (numRows == 1 || s.Length <= numRows) |
| | 1 | 29 | | { |
| | 1 | 30 | | return s; |
| | | 31 | | } |
| | | 32 | | |
| | 2 | 33 | | var stringBuilders = new StringBuilder[numRows]; |
| | | 34 | | |
| | 18 | 35 | | for (var i = 0; i < stringBuilders.Length; i++) |
| | 7 | 36 | | { |
| | 7 | 37 | | stringBuilders[i] = new StringBuilder(); |
| | 7 | 38 | | } |
| | | 39 | | |
| | 2 | 40 | | var index = 0; |
| | | 41 | | |
| | 2 | 42 | | var goingDown = false; |
| | | 43 | | |
| | 62 | 44 | | foreach (var c in s) |
| | 28 | 45 | | { |
| | 28 | 46 | | stringBuilders[index].Append(c); |
| | | 47 | | |
| | 28 | 48 | | if (index == 0 || index == numRows - 1) |
| | 12 | 49 | | { |
| | 12 | 50 | | goingDown = !goingDown; |
| | 12 | 51 | | } |
| | | 52 | | |
| | 28 | 53 | | index += goingDown ? 1 : -1; |
| | 28 | 54 | | } |
| | | 55 | | |
| | 2 | 56 | | var resultStringBuilder = new StringBuilder(); |
| | | 57 | | |
| | 20 | 58 | | foreach (var stringBuilder in stringBuilders) |
| | 7 | 59 | | { |
| | 7 | 60 | | resultStringBuilder.Append(stringBuilder); |
| | 7 | 61 | | } |
| | | 62 | | |
| | 2 | 63 | | return resultStringBuilder.ToString(); |
| | 3 | 64 | | } |
| | | 65 | | } |