FastPrepDijkstra Shortest Paths in a Weighted Undirected Graph

Dijkstra Shortest Paths in a Weighted Undirected Graph

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Problem statement

You are given vertexCount vertices numbered from 0 to vertexCount - 1, an array of undirected weighted edges, and a source vertex. Each edge is [u, v, weight] with a nonnegative weight.

The problem statement continues
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Examples

Example 1

vertexCount = 5edges = [[0,1,4],[0,2,1],[2,1,2],[1,3,1],[2,3,5]]source = 0return = [0,3,1,4,-1]

Vertex 1 is reached more cheaply through vertex 2, vertex 3 then follows through vertex 1, and vertex 4 is disconnected.

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Reported in 1 Amazon interview this week

Unlock this recently reported problem

FastPrep Pro gives you full access to interview problems reported within the last week.

  • Full problem statement and constraints
  • 2 more worked examples, explained
  • Guided hints and editorial
  • Run your code on real test cases
$8.25/month

$99 billed yearly — or $19 month-to-month. Cancel anytime.

Free plan — 2 of 2 free unlocks used this week