Package g0701_0800.s0743_network_delay_time

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    743 - Network Delay Time\.

    Medium

    You are given a network of n nodes, labeled from 1 to n. You are also given times, a list of travel times as directed edges <code>timesi = (u<sub>i</sub>, v<sub>i</sub>, w<sub>i</sub>)</code>, where <code>u<sub>i</sub></code> is the source node, <code>v<sub>i</sub></code> is the target node, and <code>w<sub>i</sub></code> is the time it takes for a signal to travel from source to target.

    We will send a signal from a given node k. Return the minimum time it takes for all the n nodes to receive the signal. If it is impossible for all the n nodes to receive the signal, return -1.

    Example 1:

    Input: times = \[\[2,1,1],2,3,1,3,4,1], n = 4, k = 2

    Output: 2

    Example 2:

    Input: times = \[\[1,2,1]], n = 2, k = 1

    Output: 1

    Example 3:

    Input: times = \[\[1,2,1]], n = 2, k = 2

    Output: -1

    Constraints:

    • 1 &lt;= k &lt;= n &lt;= 100

    • 1 &lt;= times.length &lt;= 6000

    • times[i].length == 3

    • <code>1 <= u<sub>i</sub>, v<sub>i</sub><= n</code>

    • <code>u<sub>i</sub> != v<sub>i</sub></code>

    • <code>0 <= w<sub>i</sub><= 100</code>

    • All the pairs <code>(u<sub>i</sub>, v<sub>i</sub>)</code> are unique. (i.e., no multiple edges.)

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Integer networkDelayTime(Array<IntArray> times, Integer n, Integer k)

      • Methods inherited from class java.lang.Object

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