Merge Sort is a classic divide-and-conquer sorting technique. It divides the list into two halves, sorts each half recursively, and…
Browsing: Data Structures & Algorithms
Master insertion sort step by step. See how each element “inserts” into its correct place, watch a detailed dry run,…
Learn how to list all “eventual safe” nodes in a directed graph. We use DFS with path-tracking to spot cycles…
We flip the graph, run Kahn’s topological BFS, and list every node guaranteed to avoid cycles. Includes clear intuition, step-by-step…
Check if you can finish every course when some need to be done first. We build the course graph, run…
Find the n-th Fibonacci number with a recursive function in Python. Clear problem statement, examples, easy-to-grasp intuition, commented code, dry…
Learn two easy ways to test a Palindrome String: a clean recursive method and a space saving two-pointer loop. Includes…
Learn how to detect cycle in a directed graph with Kahn’s algorithm. Simple intuition, commented Python code, step-by-step dry run,…
Learn how to perform topological sorting of a DAG using Kahn’s algorithm (BFS based). Clear steps, commented Python code, dry-run…
See how to solve “detect cycle in a directed graph” using depth-first search and two helper arrays. Simple idea, commented…