Welcome to the ultimate CSES Introductory Problems repository, your comprehensive source for mastering the foundational challenges of the CSES Problem Set. Whether you are taking your first steps into competitive programming or reinforcing your core algorithmic toolkit, you will find complete, battle tested solutions for every problem in the Introductory list. These are not mere proof of concept snippets; they are industry grade, performance tuned implementations created and refined by the world’s top competitive coders.
Dive in and discover:
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Dual Language Mastery
Each problem is solved in both Python and C++, so you can study idiomatic style in your preferred language or compare approaches side by side. -
Blazing Fast Rock Solid Code
Every solution is hand crafted for speed, efficiency, and readability, leveraging best practices and advanced techniques used by seasoned experts. It is done in the style of CP ofc. -
End to End Coverage
From “Weird Algorithm” to the very newest Introductory tasks, no problem is left behind. You will always have the most up to date answers at your fingertips. -
Learn by Example
Clear explanations, concise comments, and intuitive file organization let you jump straight into the logic—perfect for mastering patterns, preparing for contests, or guiding study groups. -
Continuous Updates
We monitor the CSES site around the clock. New Introductory problems, edge case improvements, and performance refinements appear here within hours of release.
This repository is not just a code dump; it is a living learning platform, meticulously organized to help you build confidence, sharpen your skills, and triumph over every foundational problem from day one. Scroll down to the Problem Index and click the links to start exploring solutions that will supercharge your coding journey.
This repository contains example solutions for all of the Introductory Problems from the CSES Problem Set. Below is a table mapping each problem’s ID (as found in the URL) to its name and link.
Each problem’s solution lives in its own file, named according to the problem (e.g. weird_algorithm.cpp). Compile and run the solution.