Competitive-Programming Preparation

These Questions are selected from various online coding websites to learn Algorithms for using in Competitive Prorgamming, but can be used for:

• Competitive Programming
• Practicing for Interviews
• Improving Algorithmic Thinking
• Practicing for College Class
• FUN

_PS: I am saying "Any programming language" but in this course mostly I used C++ and python some C.

Resources

In this course we will use some tools for the questions. As I mentioned above all of these questions already exists, we just highlight them so that you can reach better. Here are the websites/tools that we use through this course:

• Leetcode
• Hackerrank
• Topcoder
• Codeforces
• Lightoj

DS

• Stacks
• Queues
• Priority queue
• Hashmap
• Linked List
• Trees
• Heaps
• Advanced Trees
  • Tries
  • Segment trees
  • Fenwick tree or Binary indexed trees
  • RMQ
• SQRT Decomposition
• Disjoint Data Structure
• C++ STL (optional)

Algo

• Number Theory

  • Prime Numbers (Sieve of Eratosthenes)
  • GCD and LCM Euclid’s Algorithm
  • Modular Exponentiation
  • Long arithmetic (Multi, Add)
  • Efficient Prime Factorization

• Combinatorics(Probability-Combinations-Permutations-Matrix..)

• Computational geometry

  • Primitive Operations
    • Intuition
    • Polygon Inside, Outside
    • Implementing CCW
    • Immutable Point ADT
  • Convex Hull
  • Closest pair problem
  • Line intersection

• Sorting

  • QuickSort
  • Counting Sort
  • Merge Sort

• Searching

  • Binary Search
  • Ternary Search

• Graph Theory

  • Depth First Search (DFS)
  • Breadth First Search (BFS)
  • Dijkstra’s Shortest Path
  • Minimum Spanning Tree
  • Ford Bellman
  • Floyd Warshall
  • LCA (Lowest Common Ancestor)
  • Max Flow / Min Cut

• Dynamic programming

  • Knapsack
  • Matrix chain multiplication
  • Coin Change
  • Kadane
  • Longest increasing Subsequence (with RMQ)

• Strings

  • Z algorithm
  • Suffix Trees/Arrays
  • Knuth-Morris-Pratt Algorithm (KMP)
  • Rabin-Karp Algorithm
  • Hash

• Bit Manipulation

• Game theory

  • Nim game
  • Grundy numbers
  • Sprague-Grundy theorem

• Optional Advanced Algorithms

  • AVL Trees
  • Graph Coloring
  • Mo's Algorithm
  • Palindromic Tree
  • Heavy Light Decomposition
  • Dynamic Programming by Profile
  • Rod Cutting
  • Topological Sorting
  • DP with Bitmask - Dynamic Programming
  • Diobhantine Equation - Math
  • Flood Fill - Graph

Curated resources

Coding Practices

• Project Euler
• LeetCode
• InterviewBit
• Codility
• HackerRank
• Project Euler
• Spoj
• Google Code Jam practice problems
• HackerEarth
• Top Coder
• CodeChef
• Codewars
• CodeSignal
• CodeKata
• Firecode

Video Lectures

• Data Structures
  • UC Berkeley Data Structures
  • MIT Advanced Data Structures
• Algorithms
  • MIT Introduction to Algorithms
  • MIT Advanced Algorithms

Interview Books

• Competitive Programming 3 - Steven Halim & Felix Halim
• Cracking The Coding Interview - Gayle Laakmann McDowell
• Cracking The PM Interview - Gayle Laakmann McDowell & Jackie Bavaro
• Introduction to Algorithms - Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest & Clifford Stein

Guides

• GeeksForGeeks – A CS portal for geeks
• Learneroo – Algorithms
• Top Coder tutorials
• Infoarena training path (RO)
• Steven & Felix Halim – Increasing the Lower Bound of Programming Contests (UVA Online Judge)

Courses

• MIT – Hacking a Google Interview
• Coderust 2.0 ($$)
• Interview Cake ($$$) [review]
• How to Ace the Software Engineering Interview ($$)
• Grokking the System Design Interview ($$)

Sites

• Coding for Interviews
• Career Cup
• HiredInTech
• Codela
• TestDome
• FreeCodeCamp "Learn to code and help nonprofits"
• Dynamic Programming Practice Problems

Videos

• How to: Work at Google – Candidate Coaching Session for Technical Interviewing [45:45]
• Gayle McDowell – Cracking the Coding Interview [1:14:24]
• Gayle McDowell - Cracking the Coding Interview (examples) [9:05]
• Google Recruiters Share Technical Interview Tips [31:06]
• Google Recruiters Share Non-Technical Interview Tips [28:23]
• Moishe Lettvin – What I Learned Doing 250 Interviews at Google [1:00:24]
• Sean Lee – How to Get a Job at the Big 4 [42:34]
• Ladies Storm Hackathons – Interview Prep Round 1: Strings, Arrays, Linked Lists [1:12:39]
• Randall Koutnik – Rethinking the Developer Career Path [25:03]

System Design

• donnemartin/system-design-primer
• Grokking the System Design Interview
  • This is a paid course but has several free previews such as Designing Instagram
• binhnguyennus/awesome-scalability
• Raph Levien – Rope Science
• Architecture of Open Source Applications
• How should I prepare system design questions for Google/Facebook interview?
• Jeff Atwood – How Good an Estimator Are You?
• 0xAX/linux-insides

Computer Science News

• Hacker News
• Lobsters

New to programming; follow these resources:

* Codecademy
* Freecodecamp
* Progate
* Cs50 by Harvard university