Mastering Depth-First Search (DFS) in Graphs: A Complete Beginner’s Guide

Graphs are everywhere in programming, from social networks to road maps, and mastering them starts with understanding Depth-First Search (DFS). DFS is a fundamental graph traversal algorithm that explores as far as possible along a branch before backtracking. Whether you’re solving coding problems or tackling real-world applications, DFS is a…

read more

A Beginner’s Guide to Understanding the Basics of Topological Sort

Topological sort is a foundational concept in graph theory that helps solve problems involving dependencies. Imagine you’re organizing tasks where some tasks must be completed before others. Topological sorting provides a way to order these tasks so that all dependencies are respected. Understanding Directed Acyclic Graphs To truly understand and…

read more

Simplify Algorithm Design with the Monotonic Stack Pattern

When solving sequence-based problems—like finding the next greater element, stock span, or calculating sliding window maximum—efficiency is paramount. Many of these problems involve comparing elements across a sequence, and a brute-force approach often leads to nested loops with a costly O(n^2) time complexity. Enter the monotonic stack: a powerful data…

read more