LeetCode’un mayıs ayı için her gün bir programlama sorusu sorduğu “May Challenge”‘ın 10. gün sorusu “Find the Town Judge””ın açıklaması ve çözümü.
🔥 LeetCode May Challenge: https://leetcode.com/explore/featured/card/may-leetcoding-challenge
➡️ Problem açıklaması:
In a town, there are N people labelled from 1 to N. There is a rumor that one of these people is secretly the town judge.
If the town judge exists, then:
– The town judge trusts nobody.
– Everybody (except for the town judge) trusts the town judge.
– There is exactly one person that satisfies properties 1 and 2.
You are given trust, an array of pairs trust[i] = [a, b] representing that the person labelled a trusts the person labelled b.
If the town judge exists and can be identified, return the label of the town judge. Otherwise, return -1.
Example 1:
Input: N = 2, trust = [[1,2]]
Output: 2
Example 2:
Input: N = 3, trust = [[1,3],[2,3]]
Output: 3
Example 3:
Input: N = 3, trust = [[1,3],[2,3],[3,1]]
Output: -1
Example 4:
Input: N = 3, trust = [[1,2],[2,3]]
Output: -1
Example 5:
Input: N = 4, trust = [[1,3],[1,4],[2,3],[2,4],[4,3]]
Output: 3