How to Solve Network Delay Time Problem
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Network Delay Time
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 times[i] = (ui, vi, wi), where ui is the source node, vi is the target node,...
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Understanding the Network Delay Time Problem
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Problem Statement
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 times[i] = (ui, vi, wi), where ui is the source node, vi is the target node, and wi 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.
Network Delay Time
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Examples
times = [[2,1,1],[2,3,1],[3,4,1]], n = 4, k = 22times = [[1,2,1]], n = 2, k = 11times = [[1,2,1]], n = 2, k = 2-1Constraints
1 <= k <= n <= 1001 <= times.length <= 6000times[i].length == 31 <= ui, vi <= nui != vi0 <= wi <= 100All the pairs (ui, vi) are unique. (i.e., no multiple edges.)How Interview Coder Helps with Leetcode Problems
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