Useful Resources For Competitive Programming:

Get started on CodeChef:

• CodeChef's Code of Conduct
• A Newbie's Question
• Approach to become Good Programmer
• What problems should I start solving first?
• Frequently asked questions
• Ask your doubt
• Practice beginner problems
• Compete in our monthly contests
• Get started with the sport of programming
• Add problems to your Todo list, so that you can learn and solve them later.
• Create your own Sets of friends to follow

Steps to solve your first problem on CodeChef (video links):

• 1. Introduction to Competitive Programming (what is it, where to practice CP, how is it different from development, what type of problems, finally why do CP)
• 2. The CodeChef Platform (practice problem, contests, CC IDE, laddus, discuss)
• 3. How to Approach a Problem (parts of a problem like problem-statement, I/O format, constraints, sample I/O, and online judge)
  
• 4. Solving your First Problem on CodeChef in C++, Java, Python (coding the solution of a CC problem on CC in 3 languages)

Learn to Program:

• Code.org
• Stanford Courses
• Introduction to Algorithms
• Codecademy
• Udacity
• NPTEL-Data Structures And Algorithms(IIT Delhi)
• CodeMonkey - Write Code. Catch Bananas. Save the World

Learn Data Structures & Algorithms

• Daily Live Classes on our Unacademy platform
• Curated list of resources and problems
• Introduction to Algorithms
• Introduction to Graphs
• Computing Factorials of a huge number in C/C++

Competitive programming references for competitions

• Stanford Team Notebook
• Hitchhiker's Guide to Programming Contests

Some Programming Jewels to get you started:

• Introduction to Competitive Programming Contests
• List of Topics for programming Competitions
• MIT Open Courseware: Video lectures
• Skiena's Algorithms Lectures
• Topcoder Algorithm Tutorials

Wikibooks links:

• Data Structures
• Algorithms
• Advanced Data Structure and Algorithms

Language Specific:

• Awesome C++
• C++ Reference
• Essential C++ - Important C++ and OOPs Concepts
• Pointers in C Basics
• Pointers and Memory - Types, Allocation in C/C++
• STL Documentation
• STL-Algorithm Documentation
• TopCoder STL Tutorial Part 1
• TopCoder STL Tutorial Part 2
• Awesome Java
• Awesome Python

Learn Linux

• Awesome Linux
• UNIX Programming Tools

Practice on other sites:

• Indian Computing Olympiad
• Usaco Training Program

Other Resources

• Awesome - Everything about Computer Science
• AlgoWiki - Collection of all CS resources