Network Delay Time | LeetCode 743 | Dijkstra | Java

🎯 LeetCode Problem: Network Delay Time (Problem #743)
In this video, I’ll guide you through solving the Network Delay Time problem using Dijkstra's Algorithm. This problem is a classic graph question often asked in coding interviews, testing your understanding of shortest path algorithms.
📌 Problem Summary:
You are given a network of N nodes, represented as a graph with times that indicate how long it takes for a signal to travel between two nodes. Starting from a given node (k), calculate the time it takes for all nodes to receive the signal. If it’s not possible, return -1.
💡 What you'll learn in this video:
How to represent a graph using adjacency lists for efficient traversal.
Why Dijkstra’s Algorithm is the best choice for this shortest path problem.
Step-by-step coding explanation with clear logic and edge case handling.
How to implement a priority queue for optimal performance.
👨‍💻 Code Implementation:
The solution is implemented in Java, and I explain each part of the code to make it easy for beginners to follow. This is a must-know problem for anyone preparing for coding interviews.
🔥 Who is this for?
This tutorial is perfect for anyone learning graph theory, preparing for FAANG interviews, or looking to master problems involving shortest paths.
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💬 Have questions? Drop them in the comments, and I’ll help you out
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