Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview.

Jul 21, 2024 · In this article, I’ll walk you through the 15 most important patterns I learned that made my LeetCode journey lot less painful. I’ll share when to use each pattern along with a sample problem …

Apr 1, 2025 · A curated collection of common algorithm patterns and problem-solving templates for LeetCode and technical interviews. Each algorithm is written in Python and explained in detail using …

Jul 22, 2025 · We just published a comprehensive course on the freeCodeCamp.org channel about data structures and algorithms. This course will help you prepare for coding interviews and strengthen …

Sep 24, 2024 · This guide will walk you through each algorithm, connecting them to real-life examples and providing clear code examples to help you understand their applications in everyday life.

Apr 24, 2025 · Enter the LeetCode roadmap: your strategy for mastering algorithms, data structures, and the mental models that top-tier interviews demand. In this guide, we’ll walk through a practical …

# TODO: logic with left and right if CONDITION: left += 1 else: right -= 1 return ans. i = 0 j = 0 ans = 0 while i < len (arr1) and j < len (arr2): # TODO: logic if CONDITION: i += 1 else: j += 1 while i < len …

Templates and formulas on common coding interview patterns and problem topics. Time complexity & Sample Codes.

Jun 29, 2025 · Algorithms are just step-by-step instructions for solving a problem. Some common ones you’ll see a lot are sorting algorithms (like bubble sort, merge sort, and quicksort), searching …

This started as a repo of solutions to LeetCode problems in preparation for job interviews. I summed up some of the problems and a few special topics that I found hard to tackle or inspiring. Over time, it …