| | | 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.CountCompleteSubarraysInAnArray; |
| | | 13 | | |
| | | 14 | | /// <inheritdoc /> |
| | | 15 | | public class CountCompleteSubarraysInAnArrayFrequencyDictionary : ICountCompleteSubarraysInAnArray |
| | | 16 | | { |
| | | 17 | | /// <summary> |
| | | 18 | | /// Time complexity - O(n) |
| | | 19 | | /// Space complexity - O(n) |
| | | 20 | | /// </summary> |
| | | 21 | | /// <param name="nums"></param> |
| | | 22 | | /// <returns></returns> |
| | | 23 | | public int CountCompleteSubarrays(int[] nums) |
| | 2 | 24 | | { |
| | 2 | 25 | | var numsHashSet = new HashSet<int>(nums); |
| | | 26 | | |
| | 2 | 27 | | var count = 0; |
| | | 28 | | |
| | 2 | 29 | | var frequencyDictionary = new Dictionary<int, int>(); |
| | | 30 | | |
| | 2 | 31 | | var left = 0; |
| | | 32 | | |
| | 22 | 33 | | for (var right = 0; right < nums.Length; right++) |
| | 9 | 34 | | { |
| | 9 | 35 | | if (!frequencyDictionary.TryAdd(nums[right], 1)) |
| | 2 | 36 | | { |
| | 2 | 37 | | frequencyDictionary[nums[right]]++; |
| | 2 | 38 | | } |
| | | 39 | | |
| | 15 | 40 | | while (frequencyDictionary.Count == numsHashSet.Count) |
| | 6 | 41 | | { |
| | 6 | 42 | | count += nums.Length - right; |
| | | 43 | | |
| | 6 | 44 | | frequencyDictionary[nums[left]]--; |
| | | 45 | | |
| | 6 | 46 | | if (frequencyDictionary[nums[left]] == 0) |
| | 5 | 47 | | { |
| | 5 | 48 | | frequencyDictionary.Remove(nums[left]); |
| | 5 | 49 | | } |
| | | 50 | | |
| | 6 | 51 | | left++; |
| | 6 | 52 | | } |
| | 9 | 53 | | } |
| | | 54 | | |
| | 2 | 55 | | return count; |
| | 2 | 56 | | } |
| | | 57 | | } |