| | | 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 | | namespace LeetCode.Algorithms.MinimumLengthOfStringAfterOperations; |
| | | 13 | | |
| | | 14 | | /// <inheritdoc /> |
| | | 15 | | public class MinimumLengthOfStringAfterOperationsFrequencyArray : IMinimumLengthOfStringAfterOperations |
| | | 16 | | { |
| | | 17 | | /// <summary> |
| | | 18 | | /// Time complexity - O(n) |
| | | 19 | | /// Space complexity - O(1) |
| | | 20 | | /// </summary> |
| | | 21 | | /// <param name="s"></param> |
| | | 22 | | /// <returns></returns> |
| | | 23 | | public int MinimumLength(string s) |
| | 2 | 24 | | { |
| | 2 | 25 | | var result = 0; |
| | | 26 | | |
| | 2 | 27 | | var frequencyArray = new int['z' - 'a' + 1]; |
| | | 28 | | |
| | 28 | 29 | | foreach (var c in s) |
| | 11 | 30 | | { |
| | 11 | 31 | | if (frequencyArray[c - 'a'] == 2) |
| | 2 | 32 | | { |
| | 2 | 33 | | frequencyArray[c - 'a']--; |
| | 2 | 34 | | result--; |
| | 2 | 35 | | } |
| | | 36 | | else |
| | 9 | 37 | | { |
| | 9 | 38 | | frequencyArray[c - 'a']++; |
| | 9 | 39 | | result++; |
| | 9 | 40 | | } |
| | 11 | 41 | | } |
| | | 42 | | |
| | 2 | 43 | | return result; |
| | 2 | 44 | | } |
| | | 45 | | } |