Hello Programmers💻, A one stop Destination for all your Competitive Programming Resources.

According to us, competitive programming is a sport. A sport based on problem-solving skills, thinking ability, speed testing, regularity and to be precise. Competitive Programming will help you build logic and implement that logic to find solutions to a real-world problem. Brainstorming upon your code will definitely increase your coding skills as well as it will help to expand your thinking capacity. Thus practising Competitive Programming on day to day basis helps you in mastering that particular language. And believe us, if you are playing this sport regularly, you are already prepared for the technical rounds of the Interviews. So now let's dive in the ocean of Competitive Programming.

• HackerRank (Must do for a Beginner)

• CodeChef

• CodeForces

• HackerEarth

• Project Euler(For Mathematics)

• GeeksForGeeks

• LeetCode (For Data-Structures and Algos)

• AtCoder

• Sphere Online Judge(SPOJ)

Upcomming contests schedule - https://clist.by/

• Google KickStart🏆
• ACM ICPC (Olympics of Programming)🏆
• Google CodeJam🏆
• FaceBook Hacker Cup🏆
• TCS CodeVita🏆
• Google HashCode🏆
• CodeChef's SnackDown🏆
• Coding Block's CodeSule🏆
• Codechef Long Challenge🏆
• Codechef Cook-Off 🏆
• Codechef Lunchtime🏆
• Codeforces Rounds Div1 & Div2 🏆

• Competitive Programming 3📚
• Data Structures and Algorithms Made Easy📚 - by Narasimha Karumanchi
• Cracking the Coding Interview📚 - by Gayle Laakmann McDowell

• CP Algorithms
• Visual Alogorithms

• C++ Code Visualisation
• JAVA Code Visualisation
• PYTHON Code Visualisation

• CS Dojo - Introduction to Big O Notation and Time Complexity
• Simple Snippets - Asymptotic Analysis of Algorithms with Example
• Big-O CheatSheet https://www.bigocheatsheet.com/

• Codealittle - https://www.youtube.com/watch?v=PCahjLFtlbY&list=PL1oKdRlSbldPUXbtWctRz14C1f8R78MVZ

• Takeyouforward - https://www.youtube.com/watch?v=zBhVZzi5RdU&t=1s

• Vectors (Dynamic Arrays)

• Sets

  • Set
  • Unordered Set
  • Multiset

• Queue

• Stack

• Map

  • Map
  • Unordered Map
  • Multimap

• Pairs

• Priority Queue (Min - Max Heaps)

• Deque

• Aditya Verma https://www.youtube.com/watch?v=j7NodO9HIbk&list=PL_z_8CaSLPWeYfhtuKHj-9MpYb6XQJ_f2

• CodeNCode - https://www.youtube.com/watch?v=eRkqvQtm4DU&list=PL2q4fbVm1Ik4liHX78IRslXzUr8z5QxsG

• Aditya Verma - https://www.youtube.com/watch?v=kHi1DUhp9kM&list=PL_z_8CaSLPWeT1ffjiImo0sYTcnLzo-wY
• Codealittle - https://www.youtube.com/watch?v=-9FinR1AVys&list=PL1oKdRlSbldN8ffk23nuYQZwO0HSIPy9F

• Codealittle - https://www.youtube.com/watch?v=5upadP-hWXQ&list=PL1oKdRlSbldNz2p_xrBMf2GhCKRm-cH2A
• codencode - https://www.youtube.com/watch?v=efL86JCONH0&list=PL2q4fbVm1Ik7ip1VkWwe5U_CEb93vw6Iu

• CodeNcode - https://www.youtube.com/watch?v=VW85xQ6GJP4&list=PL2q4fbVm1Ik6DCzm9XZJbNwyHtHGclcEh
• Hitesh Tripathi - https://www.youtube.com/watch?v=1BPQYzCYDx4&list=PLJOYB9TDUqmlnn9mu11qHxxQK_ioX9Wdm

• Tushar Roy - https://www.youtube.com/watch?v=8LusJS5-AGo&list=PLrmLmBdmIlpsHaNTPP_jHHDx_os9ItYXr
• GeeksforGeeks - https://www.youtube.com/watch?v=mmjDZGSr7EA&list=PLqM7alHXFySGbXhWx7sBJEwY2DnhDjmxm
• Aditya Verma - https://www.youtube.com/watch?v=mmjDZGSr7EA&list=PLqM7alHXFySGbXhWx7sBJEwY2DnhDjmxm
• TakeYouForward - https://www.youtube.com/watch?v=PPi3326JhGc&list=PLgUwDviBIf0pmD4Eur6Cl5XfBO4EtgKGe

• Beginners - Practice @ GeeksForGeeks
• Beginners - HackerRank (Must do for a Beginner)
• Beginners - HackerEarth
• Long Challenge and Short Contest - CodeChef
• Short Contest - CodeForces
• Mathematics - Project Euler
• Data Structures and Algorithms - LeetCode (For Data-Structures and Algos)

• Vectors (Dynamic Arrays)

• Strings

• Linked List

• Stack

• Queue

  • Queue
  • Priority Queue
  • Deque

• Sets

  • Set
  • Unordered Set
  • Multiset

• Map

  • Map
  • Unordered Map
  • Multimap

• Hash Tables

• Disjoint-Set Data Structures

• Trie

• Segment Tree

• Linear Search
• Binary Search

• Selection Sort
• Bubble Sort
• Insertion Sort
• Merge Sort
• Quick Sort
• Heap Sort
• Radix Sort
• Count Sort

• CodeNcode - https://www.youtube.com/watch?v=VW85xQ6GJP4&list=PL2q4fbVm1Ik6DCzm9XZJbNwyHtHGclcEh

• Prime Number Generation (Sieve, Segmented Sieve)
• Euler Totient Theorem
• Fermat’s Theorem
• HCF & LCM (Euclid)
• Linear Diophantine Equations (Extended Euclid)
• Modulus Arithmetic (addition,multiplication,subtraction,modular Inverse)

• Basic Probability and Conditional Probability
• Random Variables
• Probability Generating Functions
• Expectation
• Probability Distribution [Binomial, Poisson, Normal,Bernoulli]

• Multiplication ( Strassen's algorithm ), Logarithmic exponentiation
• Matrix Transformations [ Transpose, Rotation Of Matrix, Representing Linear Transformations Using Matrix ]
• Determinant , Rank and Inverse Of Matrix [ Gaussian Elimination , Gauss Jordan Elimination]
• Solving System Of Linear Equations
• Matrix Exponentiation To Solve Recurrences

• CodeNCode - https://www.youtube.com/watch?v=eRkqvQtm4DU&list=PL2q4fbVm1Ik4liHX78IRslXzUr8z5QxsG

• Adjacency Matrix
• Adjacency List

• Directed
• Undirected
• Weighted
• Unweighted
• Euler

• DFS
• BFS
• Strongly Connected Component
• Connected Component
• Cycle Detection
• Articulation Points
• Bridges
• Topological Sorting
• Bipartite Checking
• Flood-fill algorithm

• Prim’s Algorithm
• Kruskal Algorithm
• Dijkstra
• Bellman Ford
• Floyd Warshall’s Algorithm
• Euler Tour

• Tushar Roy - https://www.youtube.com/watch?v=8LusJS5-AGo&list=PLrmLmBdmIlpsHaNTPP_jHHDx_os9ItYXr
• GeeksforGeeks - https://www.youtube.com/watch?v=mmjDZGSr7EA&list=PLqM7alHXFySGbXhWx7sBJEwY2DnhDjmxm

• Fibonacci Series
• Longest Common Substring
• Longest Increasing Subsequence
• Longest Palindromic Substring
• Edit Distance
• Egg Dropping Puzzle
• Integer Knapsack
• Longest Common Subsequence
• Longest Substring Without Repeating Character
• Matrix Chain Multiplication
• Max Size Square Submatrix With One
• Maximum Length Chain