Shortest Distances (Dijkstra)
Hard · Graphs
A directed graph has nodes numbered 0 to n - 1. Each edge is [from, to, weight] with a non-negative weight.
Write a function shortestDistances that returns an array where index i holds the length of the shortest path from start to node i. Use -1 for nodes that cannot be reached. The distance from start to itself is 0.
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