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Solution: Network Delay Time

Explore how to determine the minimum time for all nodes in a directed graph to receive a signal from a starting node. Learn to construct an adjacency dictionary, utilize a priority queue, and apply Dijkstra's algorithm to efficiently compute delays and handle unreachable nodes.

Statement

A network of n nodes labeled 11 to nn is provided along with a list of travel times for directed edges represented as times[i]=(xi, yi, ti)times[i]=(x_i​, \space y_i, \space t_i​), where xix_i​ is the source node, yiy_i​ is the target node, and tit_i ...