| | | 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.FindTheTownJudge; |
| | | 13 | | |
| | | 14 | | /// <inheritdoc /> |
| | | 15 | | public class FindTheTownJudgeDictionary : IFindTheTownJudge |
| | | 16 | | { |
| | | 17 | | /// <summary> |
| | | 18 | | /// Time complexity - O(n + t) |
| | | 19 | | /// Space complexity - O(n) |
| | | 20 | | /// </summary> |
| | | 21 | | /// <param name="n"></param> |
| | | 22 | | /// <param name="trust"></param> |
| | | 23 | | /// <returns></returns> |
| | | 24 | | public int FindJudge(int n, int[][] trust) |
| | 5 | 25 | | { |
| | 5 | 26 | | var trustCounts = new int[n + 1]; |
| | 5 | 27 | | var trustsSomeone = new bool[n + 1]; |
| | | 28 | | |
| | 27 | 29 | | foreach (var t in trust) |
| | 6 | 30 | | { |
| | 6 | 31 | | trustCounts[t[0]]--; |
| | 6 | 32 | | trustCounts[t[1]]++; |
| | 6 | 33 | | trustsSomeone[t[0]] = true; |
| | 6 | 34 | | } |
| | | 35 | | |
| | 26 | 36 | | for (var i = 1; i <= n; i++) |
| | 11 | 37 | | { |
| | 11 | 38 | | if (trustCounts[i] == n - 1 && !trustsSomeone[i]) |
| | 3 | 39 | | { |
| | 3 | 40 | | return i; |
| | | 41 | | } |
| | 8 | 42 | | } |
| | | 43 | | |
| | 2 | 44 | | return -1; |
| | 5 | 45 | | } |
| | | 46 | | } |