Competitions / Advanced

• Google Kick Start - University students looking to develop their coding skills and potentially pursue a Google career.

• Google Hash Code - Students in Africa, Europe, and the Middle East looking to work as a team on real Google problems.

Competitions / Advanced

• Google Code Jam - Google’s largest coding competition, calls on programmers around the world to put their skills to the test by solving multiple rounds of algorithmic puzzles.

Courses / Introductory

• Algorithms - Khan Academy.

• Fundamentals of Algorithms - Geeks for Geeks.

Courses / Intermediate

• Algorithms and Data Structures - Class Central.

• Algorithms - edX(IITBombay).

• Intro to Algorithms - Udacity.

• Design and Analysis of Algorithms, 2015 - MIT OCW.

• Introduction to Algorithms, 2011 - MIT OCW.

• Classes and Teaching by Erik Demaine - MIT(Lecture notes).

• Efficient Algorithms and Intractable Problems, 2001 - UC Berkeley(Lecture notes).

• Data Structures, 2014 - UC Berkeley(Lecture notes).

• Algorithms, Etc., 2015 - Illinois University(Lecture notes).

• Algorithms, Part I - Coursera(Princeton University).

• Algorithms, Part II - Coursera(Princeton University).

Courses / Advanced

• Data Structures and Algorithms - Paid Content. / Harvard University.

• Algorithms Specialization - Paid Content. / Coursera(Stanford University).

Competitive programming / Advanced

• HackerRank

• Codility

• TopCoder

• CodeWars

• CodeChef

• UVA

• A2 Online Judge

• ACM-ICPC Live Archive

• CoderByte

• HackerEarth

• Kattis

• Learneroo Algorithms Tutorials

• Rosalind

• ShareCode

• Snakify

• Sphere Online Judge (SPOJ)

• Project Euler

Visualizations / Advanced

• Algorithm Visualizer

• A Visual Guide to Graph Traversal Algorithms

• Algomation

• Algorithms Visualization

• Data Structure Visualizations

• Sorting Algorithms Animations

• SORTING

• String Matching Visualization

• Path Finding

• Algorithm Wiki by Will Thimbleby

• TensorFlow Playground

• Tangle (⭐1.5k) - JavaScript Programming Language.

• Vamonos - JavaScript Programming Language.

• The Sound of Sorting - C ++ Programming Language.

• GeneaQuilts - Java Programming Language.

Books / Advanced

• Data Structures and Algorithms

• Thinking critically about and researching algorithms

Articles / Advanced

• stoimen's web log

• What are the best and efficient ways to learn algorithms for beginners?

• What are the best books on algorithms and data structures?

Miscellaneous / Advanced

• Competitive Programming (⭐10k)

• MIT OpenCourseWare

• Awesome Data Science (⭐20k)

• Awesome Machine Learning (⭐56k)

• Rosetta Code - The idea is to present solutions to the same task in as many different languages as possible, to demonstrate how languages are similar and different, and to aid a person with a grounding in one approach to a problem in learning another.

• Code.org - Anybody can learn.

• CheckiO - Online game for Python and JavaScript coders.

• HUST Online Judge System (⭐59) - Online Judge is a web application.

Courses / Introductory

• Algorithm course for smart programming - Korean / Inflearn.

Competitive programming / Advanced

• Codeforces - English, Romanian, Russian.

• CS Academy - English, Russian, Arabic.

• Infoarena - Romanian.

• LeetCode - English, Chinese.

• URI - English, Spanish, Brazilian Portuguese.

• PKU JudgeOnline - English, Chinese.

• AIZU ONLINE JUDGE - English, Japanese.

• Project Euler @kr - Korean.

• Baekjoon - Korean.

• Algospot - Korean.

• Dovelet - Korean.

• JUNGOL - Korean.

• Koistudy - Korean.

• CodeUp - Korean.

• Codingdojang - Korean.

• Programmers - Korean.

• Codeground - English, Korean.

• SW Expert Academy - Korean.

Visualizations / Advanced

• VisuAlgo - English, Korean, Chinese, Japanese.

Interviews / Advanced

• Software Engineering technical interviews (⭐58k)

• Tech Interview Handbook (⭐80k)

• Interactive Python coding interview challenges (⭐26k)

Videos / Advanced

• How algorithms shape our world - Kevin Slavin.

• Algorithms - Oresoft LWC.

• Computer Sc - Programming and Data Structure - Nptelhrd.

• Design and Analysis of Algorithms, 2015

• Introduction to Algorithms, 2011

• Merge Sort vs Quick Sort

• 15 Sorting Algorithms in 6 Minutes

• AlgoRythmics - Sapientia University.

Books / Advanced

• Elementary Algorithms (⭐5.4k)

• Korea Olympiad in Informatics

• CRACKING the CODING INTERVIEW - GitHub (⭐10k), Quora.

• Algorithmic Problem Solving Strategies - Korean.

Articles / Advanced

• Study data for algorithm - Korean.

Competitions / Advanced

• Google Summer of Code - A global program focused on introducing students to open source software development. Students work on a 3 month programming project with an open source organization during their break from university.

Miscellaneous / Advanced

• Tech stack for Baekjoon online judge - Korean / How to choose a technology stack for judge?

Interviews / Advanced

• Interview Cake

• Top 10 Algorithms for Coding Interview

Books / Advanced

• Algorithm Design

• Algorithms

• Introduction to Algorithms

• Grokking Algorithms

Miscellaneous / Advanced

• OEDb(Open Education Databases): Algorithm