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Essential Resources for Competitive Programmers

Handpicked sheets, algorithmic benchmarks, clean cses solutions, and mathematical references.

DSA Sheet

Striver's A2Z DSA Sheet

Most famous topic-wise A2Z DSA roadmap from elementary basics to advanced interview problems.

A2Z Sheet Step-by-Step FAANG Prep Interview Tracker
takeuforward.org Open Sheet
Problem Set

CSES Problem Set

The premium collection of 300+ classic competitive programming problems.

300+ Problems CP Benchmark Classic Algorithms Automated Judge
cses.fi/problemset Solve on CSES
Solutions

CSES Solutions in Python

Clean python solutions and explanations for the CSES problem set by OmAmar, the lord of IIITN

Python Tested Solutions OmAmar Leetcode Guardian (top 0.16%) codechef AIR 69
github.com/OmAmar106 View Code
Book

CP Handbook

The definitive cp algorithmic textbook. you can find almost anything here.

Free PDF Book Algorithms Theory ICPC / IOI
cses.fi/book (PDF) Read PDF
Maths!

Number Sequence Encyclopedia

The On-Line Encyclopedia of Integer Sequences (OEIS) is the competitive coder's secret weapon.

Integer Sequences DP Recurrences Combinatorics OEIS Database
oeis.org Search OEIS