g2301_2400.s2359_find_closest_node_to_given_two_nodes

Class Solution

java.lang.Object

g2301_2400.s2359_find_closest_node_to_given_two_nodes.Solution

public class Solution
extends Object

2359 - Find Closest Node to Given Two Nodes.

Medium

You are given a directed graph of n nodes numbered from 0 to n - 1, where each node has at most one outgoing edge.

The graph is represented with a given 0-indexed array edges of size n, indicating that there is a directed edge from node i to node edges[i]. If there is no outgoing edge from i, then edges[i] == -1.

You are also given two integers node1 and node2.

Return the index of the node that can be reached from both node1 and node2_, such that the maximum between the distance from_ node1 to that node, and from node2 to that node is minimized. If there are multiple answers, return the node with the smallest index, and if no possible answer exists, return -1.

Note that edges may contain cycles.

Example 1:

Input: edges = [2,2,3,-1], node1 = 0, node2 = 1

Output: 2

Explanation: The distance from node 0 to node 2 is 1, and the distance from node 1 to node 2 is 1.

The maximum of those two distances is 1. It can be proven that we cannot get a node with a smaller maximum distance than 1, so we return node 2.

Example 2:

Input: edges = [1,2,-1], node1 = 0, node2 = 2

Output: 2

Explanation: The distance from node 0 to node 2 is 2, and the distance from node 2 to itself is 0.

The maximum of those two distances is 2. It can be proven that we cannot get a node with a smaller maximum distance than 2, so we return node 2.

Constraints:

• n == edges.length
• 2 <= n <= 105
• -1 <= edges[i] < n
• edges[i] != i
• 0 <= node1, node2 < n

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
int	closestMeetingNode(int[] edges, int node1, int node2)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Solution

public Solution()

Method Detail

closestMeetingNode

public int closestMeetingNode(int[] edges,
                              int node1,
                              int node2)