| | | 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.MyCalendar3; |
| | | 13 | | |
| | | 14 | | /// <inheritdoc /> |
| | | 15 | | public class MyCalendar3FrequencyDictionary : IMyCalendar3 |
| | | 16 | | { |
| | 1 | 17 | | private readonly SortedDictionary<int, int> _frequencyDictionary = new(); |
| | | 18 | | private int _maxFrequency; |
| | | 19 | | |
| | | 20 | | /// <summary> |
| | | 21 | | /// Time complexity - O(n) |
| | | 22 | | /// Space complexity - O(n) |
| | | 23 | | /// </summary> |
| | | 24 | | /// <param name="startTime"></param> |
| | | 25 | | /// <param name="endTime"></param> |
| | | 26 | | /// <returns></returns> |
| | | 27 | | public int Book(int startTime, int endTime) |
| | 6 | 28 | | { |
| | 6 | 29 | | if (!_frequencyDictionary.TryAdd(startTime, 1)) |
| | 2 | 30 | | { |
| | 2 | 31 | | _frequencyDictionary[startTime]++; |
| | 2 | 32 | | } |
| | | 33 | | |
| | 6 | 34 | | if (!_frequencyDictionary.TryAdd(endTime, 0)) |
| | 1 | 35 | | { |
| | 1 | 36 | | _frequencyDictionary[endTime]--; |
| | 1 | 37 | | } |
| | | 38 | | else |
| | 5 | 39 | | { |
| | 5 | 40 | | _frequencyDictionary[endTime] -= 1; |
| | 5 | 41 | | } |
| | | 42 | | |
| | 6 | 43 | | var currentFrequency = 0; |
| | | 44 | | |
| | 86 | 45 | | foreach (var frequency in _frequencyDictionary.Values) |
| | 34 | 46 | | { |
| | 34 | 47 | | currentFrequency += frequency; |
| | | 48 | | |
| | 34 | 49 | | _maxFrequency = Math.Max(_maxFrequency, currentFrequency); |
| | 34 | 50 | | } |
| | | 51 | | |
| | 6 | 52 | | return _maxFrequency; |
| | 6 | 53 | | } |
| | | 54 | | } |