Network Delay Time | LeetCode 743 | Dijkstra’s Algorithm | Java & C++ code скачать в хорошем качестве

Network Delay Time | LeetCode 743 | Dijkstra’s Algorithm | Java & C++ code

We are given a directed weighted graph with n nodes, where each edge (u, v, w) means a signal takes w time to travel from node u to node v. A signal starts from a given source node k. We need to determine the minimum time for the signal to reach all nodes. Solution : https://github.com/Codefou01/LeetCode... If it’s not possible to reach all nodes, return -1. 💡 Intuition / Approach This problem is a direct application of Dijkstra’s Algorithm: Use a min-heap / priority queue to always process the node with the smallest known time first. Maintain a distance array to store the shortest time from the source to each node. Update neighbors with newTime = currentTime + edgeWeight if it gives a shorter path. Finally, the answer will be the maximum time among all reachable nodes. If some node is not reachable, return -1. Time Complexity (TC): Using a priority queue: O((V + E) log V) V = number of nodes E = number of edges Space Complexity (SC): O(V + E) for adjacency list + distance array + priority queue Don't forget to like, comment, and subscribe if this helped you! Share with your friends preparing for interviews😊 #coding #youtube #programming #dsa #gfg #leetcode #interview #technical #codinginterview #java #C++