Detect a Cycle in an Directed Graph (DFS) | Graph Series

How do you detect a cycle in a directed graph using DFS? In this video, we'll understand the intuition behind the algorithm, walk through a complete dry run, and implement the solution in C++. Instead of just memorizing the code, we'll understand why a normal visited array isn't enough, how the recursion stack helps us detect a cycle, and why a back edge indicates a cycle in a directed graph. If you're preparing for coding interviews or strengthening your graph fundamentals, this video will help you understand the algorithm step by step. 👍 Like the video if it helped you understand cycle detection, and subscribe for more tech content! #DSA #GraphAlgorithms #CycleDetection #DirectedGraph #DFS #Cpp #CodingInterview #DataStructuresAndAlgorithms #programming