a_vantik_a's blog

By a_vantik_a, 6 weeks ago, In English

Hey Community,

Below, you will find a list of simple CP tools which I use on a regular basis for self analysis. I would love to know about any other active CP Analyzer tools (for CF, Leetcode, Codechef, GFG, etc.), learning resources and browser extensions.



Javascript Extension to auto-commit your leetcode, GFG & atcoder solutions to GitHub

If any other useful tools are missing please try to add those in the comment section. Hope my blog is helpful to this community If you love it, then do share with your CP friends. Happy Coding :) Thank you!


Practice (Easy to Difficult Website Ranking)


  • Object Oriented Programming

  • Time && Space Complexity

  • Conditions & Loops

  • Arrays

    • Linear Arrays
    • Circular Arrays E1 E2
    • MEX
    • XOR
  • Strings

    • Subsets
  • Math

    • Modular Arithmetic
    • Number Theory
    • Combinations
    • Permutations E1
    • Determinants
    • Probability
    • Geometry
    • Primes
    • GCD
  • Linked List

  • Stacks and Queues

    • Priority Queues
  • Min Max Heaps

  • Hashing, Sets, Multisets

  • Trees

    • Binary Search Tree (BST)
    • Tries, Segment Tree, Fenwick Tree (or Binary Indexed Tree)
    • Minimum Spanning Tree, Suffix Tree
    • Disjoint Set (or Union-Find)
    • Trie
  • Graphs

    • Simple Nodes (numbers)
    • Complex Nodes (objects)


  • Arrays:

    • Bit Masking
    • Bit Manipulations
    • Prefix Sum — Precomputations
    • Sliding Window — Two pointers
    • Kadane's Algorithm
    • Josephus Algorithm
    • Square Root Decomposition
    • MO Algorithm
  • String

    • Rabin-Karp Algorithm
    • Manacher's Algorithm
    • Z algorithm
  • Greedy Approach, Bruteforce

    • Recursion
    • Backtracking
  • Optimization

    • Memoization
    • Dynamic Programming
    - Knapsack Problem [E1](https://www.codechef.com/problems/KNPSK) [E2](https://practice.geeksforgeeks.org/problems/subset-sum-problem-1611555638/1/) [E3](https://leetcode.com/problems/partition-equal-subset-sum/) [E4](https://practice.geeksforgeeks.org/problems/perfect-sum-problem5633/1) [E5](https://www.google.com)
    • Binary Search — Divide and Conquer
  • Math

    • Binary hyperparameter search
    • Logarithmic Exponentiation
    • Chinese Remainder Theorem
    • Convex Hull Construction
    • Stable marriage problem
    • Fast-Fourier Transform
    • Sieve of Eratosthenes
    • Binary Exponentiation
    • Euclidean Algorithm
    • Sweep Line Algorithm
    • Gaussian Elimination
    • Manhattan Distance
    • Catalan Numbers
    • Pigeonhole
  • Graph

    • Breadth First Search
    • Depth First Search
    • Flood Fill
    • Shortest Path
    • Dijkstra Algorithm
    • Floyd Warshall Algorithm
    • Bellman Ford Algorithm
    • Prims Algorithm
    • Krushal Algorithm
    • Topological Sort
    • Lowest Common Ancestor
    • Euler Tour of Tree
    • Bipartite Graph
    • Strongly Connected Component
    • Heavy-light Decomposition

Feel Free to mention below in the comments, if any important topic is missing in this list (no need to spread hatred comments instead). I hope my blog reaches the right people who are in need of help. I never had a good guidance. At least you all should.

Thank you. Happy Coding :)

  • Vote: I like it
  • -9
  • Vote: I do not like it

6 weeks ago, # |
  Vote: I like it 0 Vote: I do not like it

Personally, I love these two plugins. Just give them a try.

  1. CF-Predictor

  2. Coder's Calendar

  • »
    5 weeks ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    Thanks for sharing cfpredictor It is a great stress-buster. Finally I think I can sleep in peace after a contest.

5 weeks ago, # |
  Vote: I like it 0 Vote: I do not like it

Here is my favourite one: https://chrome.google.com/webstore/detail/upsolve-tracker/gadhgehadcnbmhjkpnjbhjhdbohdokpj?hl=en

You can add problem from any website in ToDo list and solve later.

5 weeks ago, # |
  Vote: I like it 0 Vote: I do not like it

Carrot is a more accurate extension than CF Predictor which has a lot of bugs also. I recommend you swap the two. Most people I know that use predictor extension use Carrot.

5 weeks ago, # |
Rev. 3   Vote: I like it +5 Vote: I do not like it

>>>>> Roadmap to Competitive Programming (based on personal experience!)<<<<<


Object Oriented Programming (YES!!)

This is hilarious

Also, "Pigeonhole" is not an algorithm, and neither is "Maximizing Problems" (unless you mean something like Simplex algorithm), and I am not sure how important "Determinants" is. Important algorithms/formulas like CRT and a ton of others are missing.

To be honest, I suggest you to just delete the whole "Important Concepts/Algorithms" section to avoid misguiding others. Thank you.

3 weeks ago, # |
  Vote: I like it 0 Vote: I do not like it

It would be nice if you could update the links to these topics.

3 weeks ago, # |
  Vote: I like it 0 Vote: I do not like it

I don't think pupils need to know Heavy-light Decomp, but I was suggest starting small then expanding.