| | | 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.ExcelSheetColumnTitle; |
| | | 15 | | |
| | | 16 | | /// <inheritdoc /> |
| | | 17 | | public class ExcelSheetColumnTitleIterative : IExcelSheetColumnTitle |
| | | 18 | | { |
| | | 19 | | /// <summary> |
| | | 20 | | /// Time complexity - O((log n) ^ 2) |
| | | 21 | | /// Time complexity - O(log n) |
| | | 22 | | /// </summary> |
| | | 23 | | /// <param name="columnNumber"></param> |
| | | 24 | | /// <returns></returns> |
| | | 25 | | public string ConvertToTitle(int columnNumber) |
| | 3 | 26 | | { |
| | 3 | 27 | | var stringBuilder = new StringBuilder(); |
| | | 28 | | |
| | 8 | 29 | | while (columnNumber > 0) |
| | 5 | 30 | | { |
| | 5 | 31 | | stringBuilder.Insert(0, (char)(((columnNumber - 1) % 26) + 'A')); |
| | | 32 | | |
| | 5 | 33 | | columnNumber = (columnNumber - 1) / 26; |
| | 5 | 34 | | } |
| | | 35 | | |
| | 3 | 36 | | return stringBuilder.ToString(); |
| | 3 | 37 | | } |
| | | 38 | | } |