https://github.com/rain1024/datastructures-algorithms-competitive-programming

<Hello!> -|DaS.Algo|- +Pr0bl3m5! `Comp::Ete` {Solve~Fun} ^Join_us^
https://github.com/rain1024/datastructures-algorithms-competitive-programming

advent-of-code advent-of-code-2022 algorithm algorithms codeforces competitive-programming data-structures data-structures-and-algorithms leetcode

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<Hello!> -|DaS.Algo|- +Pr0bl3m5! `Comp::Ete` {Solve~Fun} ^Join_us^

• Host: GitHub
• URL: https://github.com/rain1024/datastructures-algorithms-competitive-programming
• Owner: rain1024
• Created: 2022-11-11T11:45:53.000Z (almost 3 years ago)
• Default Branch: main
• Last Pushed: 2025-01-31T02:01:00.000Z (9 months ago)
• Last Synced: 2025-04-26T13:41:07.384Z (6 months ago)
• Topics: advent-of-code, advent-of-code-2022, algorithm, algorithms, codeforces, competitive-programming, data-structures, data-structures-and-algorithms, leetcode
• Language: C++
• Homepage:
• Size: 2.58 MB
• Stars: 12
• Watchers: 2
• Forks: 4
• Open Issues: 21
• Metadata Files:
  • Readme: README.md
  • Changelog: HISTORY.md

Awesome Lists containing this project

README

          



Data Structures & Algorithms 


Competitive Programming






```

 

-|DaS.Algo|-

+Pr0bl3m5!

`Comp::Ete`

{Solve~Fun}

 ^Join_us^

```



---



  Programming Languages: 


  Python, 

  C++, 

  Java, 

  

  Typescript

  



---

⭐ [New Version 1.3.0 is released.](https://github.com/rain1024/datastructures-algorithms-competitive-programming/releases)

## ⚛ Introduction





Introduction to Data Structures and Algorithms





Introduction to Competitive Programming





Choosing a Programming Language





## 📑 Data Structures

A data structure is a data organization, management, and storage format that is usually chosen for efficient access to data. More recisely, a data structure is a collection of data values, the relationships among them, and the functions or operations that can be applied to the data.

B - Basic, A - Advanced





B 

Array





B

String





B

Linked List





B

Stack





B 

Queue





B

Set





B

Hash Table





B Heap





B Priority Queue

cpp🐀





A

Tree





A

Binary Search Tree





A AVL Tree



A Red-Black Tree



A Segment Tree



A Fenwick Tree







A

Graph





A Prefix sum (Range queries)

cpp🐀

py🐍





A Disjoin Set





A Bloom Filter





A LRU Cache





A Skiplist

cpp🐀







## 👾 Algorithms

An algorithm is a finite sequence of rigorous instructions, typically used to solve a class of specific problems or to perform a computation.

B - Basic, A - Advanced

### 📦 Algorithms by Topic





Big-O






Math





B Bit Manipulation

cpp🐀

py🐍





B Binary Floating Point 





B Factorial





B Fibonacci Number





B Prime Factors 





B Primality Test 





B Euclidean Algorithm





B Least Common Multiple 





B Sieve of Eratosthenes 





B Is Power of Two





B Pascal's Triangle





B Complex Number





B Radian & Degree 





B Fast Powering





B Horner's method  





B Matrices 





B Euclidean Distance 





A Integer Partition





A Square Root 





A Liu Hui π Algorithm 





A Discrete Fourier Transform 







Sets





B Cartesian Product 





B Fisher–Yates Shuffle 





A Power Set





A Permutations





A Combinations





A Longest Common Subsequence 





A Longest Increasing Subsequence





A Shortest Common Supersequence 





A Knapsack Problem 





A Maximum Subarray 





A Combination Sum 







Strings





B Hamming Distance 





B Palindrome 





A Levenshtein Distance 





A Knuth–Morris–Pratt Algorithm 





A Z Algorithm 





A Rabin Karp Algorithm 





A Longest Common Substring





A Regular Expression Matching









Searches

py🐍





B Linear Search





B Jump Search





B Binary Search





B Interpolation Search 









Sorting

cpp🐀

py🐍





B Bubble Sort





B Selection Sort





B Insertion Sort





B Heap Sort





B Merge Sort





B Quicksort 





B Shellsort





B Counting Sort





B Radix Sort









Two Pointers





Linked Lists





B Straight Traversal





B Reverse Traversal









Trees





B Depth-First Search (DFS)





B Breadth-First Search (BFS)









Graphs





B Depth-First Search (DFS)





B Breadth-First Search (BFS)





B Kruskal’s Algorithm 





A Dijkstra Algorithm 





A Bellman-Ford Algorithm





A Floyd-Warshall Algorithm 





A Detect Cycle





A Prim’s Algorithm





A

Topological Sorting





A Articulation Points





A Bridges - DFS based algorithm





A Eulerian Path and Eulerian Circuit - Fleury's algorithm - Visit every edge exactly once





A Hamiltonian Cycle - Visit every vertex exactly once





A Strongly Connected Components - Kosaraju's algorithm





A Travelling Salesman Problem - shortest possible route that visits each city and returns to the origin city









Cryptography





B Polynomial Hash - rolling hash function based on polynomial





B Rail Fence Cipher - a transposition cipher algorithm for encoding messages





B Caesar Cipher - simple substitution cipher





B Hill Cipher - substitution cipher based on linear algebra









Machine Learning





B NanoNeuron - 7 simple JS functions that illustrate how machines can actually learn (forward/backward propagation)





B k-NN - k-nearest neighbors classification algorithm





B k-Means - k-Means clustering algorithm









Image Processing





B Seam Carving - content-aware image resizing algorithm









Statistics





B Weighted Random - select the random item from the list based on items' weights









Evolutionary algorithms





A Genetic algorithm - example of how the genetic algorithm may be applied for training the self-parking cars









Uncategorized





B Tower of Hanoi





B Square Matrix Rotation - in-place algorithm





B Jump Game - backtracking, dynamic programming (top-down + bottom-up) and greedy examples





B Unique Paths - backtracking, dynamic programming and Pascal's Triangle based examples





B Rain Terraces - trapping rain water problem (dynamic programming and brute force versions)





B Recursive Staircase - count the number of ways to reach to the top (4 solutions)





B Best Time To Buy Sell Stocks - divide and conquer and one-pass examples





A N-Queens Problem





A Knight's Tour









### 💠 Algorithms by Paradigm





Brute Force - look at all the possibilities and selects the best solution

cpp🐀

py🐍





B Linear Search





B Rain Terraces - trapping rain water problem





B Recursive Staircase - count the number of ways to reach to the top





A Maximum Subarray





A Travelling Salesman Problem - shortest possible route that visits each city and returns to the origin city





A Discrete Fourier Transform - decompose a function of time (a signal) into the frequencies that make it up









Greedy - make the locally optimal choice at each stage with the hope of finding a global optimum

py🐍





B Jump Game





A Unbound Knapsack Problem





A Dijkstra Algorithm - finding the shortest path to all graph vertices





A Prim’s Algorithm - finding Minimum Spanning Tree (MST) for weighted undirected graph





A Kruskal’s Algorithm - finding Minimum Spanning Tree (MST) for weighted undirected graph









Divide and Conquer - divide the problem into a number of subproblems that are smaller instances of the same problem





B Binary Search





B Tower of Hanoi





B Pascal's Triangle





B Euclidean Algorithm - calculate the Greatest Common Divisor (GCD)





B Merge Sort





B Quicksort





B Tree Depth-First Search (DFS)





B  Graph Depth-First Search (DFS)





B Matrices - generating and traversing the matrices of different shapes





B Jump Game





B Fast Powering





B Best Time To Buy Sell Stocks - divide and conquer and one-pass examples





A Permutations (with and without repetitions)





A Combinations (with and without repetitions)





A Maximum Subarray









Dynamic Programming - break the problem into subproblems and store the results of subproblems to avoid computing the same results again

(basic: cpp🐀, intermidate: cpp🐀)





B Fibonacci Number





B Jump Game





B Unique Paths





B Rain Terraces - trapping rain water problem





B Recursive Staircase - count the number of ways to reach to the top





B Seam Carving - content-aware image resizing algorithm





A Levenshtein Distance - minimum edit distance between two sequences





A Longest Common Subsequence (LCS)





A Longest Common Substring





A Longest Increasing Subsequence





A Shortest Common Supersequence





A 0/1 Knapsack Problem





A Integer Partition





A Maximum Subarray





A Bellman-Ford Algorithm - finding the shortest path to all graph vertices





A Floyd-Warshall Algorithm - find the shortest paths between all pairs of vertices





A Regular Expression Matching









Backtracking - similarly to brute force, try to generate all possible solutions, but each time you generate next solution you test if it satisfies all conditions, and only then continue generating subsequent solutions. Otherwise, backtrack, and go on a different path of finding a solution. Normally the DFS traversal of state-space is being used.





B Jump Game





B Unique Paths





B Power Set - all subsets of a set





A Hamiltonian Cycle - Visit every vertex exactly once





A N-Queens Problem





A Knight's Tour





A Combination Sum - find all combinations that form specific sum









Branch & Bound remember the lowest-cost solution found at each stage of the backtracking search, and use the cost of the lowest-cost solution found so far as a lower bound on the cost of a least-cost solution to the problem, in order to discard partial solutions with costs larger than the lowest-cost solution found so far. Normally BFS traversal in combination with DFS traversal of state-space tree is being used.





## 🔆 Collections

**Competitive Programming Events**

* 🎄 Advent of Code ([2015](collections/advent-of-code/2015/), [2022](collections/advent-of-code/2022/))

* 🔰 Google Code Jam ([2022](collections/codejam-2022/))

**Coding Problems Website**

* [🔸 LeetCode](collections/leetcode/)

* [🔸 Codeforces](collections/codeforces/)

**Courses & Specialization**

* [🍨 Data Structures and Algorithms Specialization](collections/datastructures-and-algorithms-specialization/), University of California San Diego

## Contributors

This project exists thanks to all the people who contributed.