See how to solve “detect cycle in a directed graph” using depth-first search and two helper arrays. Simple idea, commented…
Browsing: Intermediate
Learn how to test if an undirected graph is bipartite by coloring it with two colors. Simple DFS idea, commented…
Learn how to count the number of islands (leetcode 200) in a 2-D grid using both Breadth-First Search (BFS) and…
Learn how to detect a cycle in an undirected graph with a depth-first search (DFS) approach. This beginner-friendly guide walks…
Learn how to detect a cycle in an undirected graph with a breadth-first search (BFS) approach. This beginner-friendly guide walks…
Discover how to implement the classic “Flood Fill” algorithm on a 2D image grid using both Depth-First Search (DFS) and…
Learn how to perform a DFS Traversal in Graph represented by an adjacency list using simple Python recursion. Step by…
Learn how to perform BFS Traversal in Graph represented by an adjacency list. This hands guide uses Python’s collections.deque, walks…
Learn how to calculate the diameter (longest path) of a binary tree in one pass using recursion. Clear, step-by-step code…
How to calculate the maximum depth of binary tree with simple Python recursion. This beginner-friendly article breaks down the “why”…