Hello Codeforces Community!

The CSES Problemset (cses.fi) is widely considered one of the best platforms for mastering core algorithms and data structures. However, compared to platforms like Codeforces, it lacks a few quality-of-life features that can make your practice workflow much smoother.

Specifically:

1. You have to save your code to a file locally just to upload and submit it.
2. There are no copy buttons on the input/output sample test cases.
3. There is no built-in way to bookmark/star tasks you want to review later.
4. There is no dynamic category-wise progress tracker, solve streak counter, or random problem selector.

To solve these annoyances, I built CSES Pro -- a lightweight, completely free, and open-source Chrome Extension that injects these features directly into the native CSES site.

Feature Showcase

1. Codeforces-Style Submit Editor

No more saving temporary .cpp or .py files on your desktop just to upload them. The extension replaces the native file input with a clean text area where you can paste your code. It automatically detects your language choice from the dropdown and handles the submission in the background.

A toggle switch lets you switch back to standard file uploads at any time.

2. Sample Input/Output Copy Buttons

Input, output, and code block panels on problem statements are converted into structured boxes with an instant "Copy" button, saving you the hassle of dragging and copying extra whitespace.

3. Collapsible Analytics Dashboard

Injected directly at the top of the problemset list and your user profile page.

• Interactive SVG Donut Chart showing solved vs. unsolved ratios.
• Daily Solve Streaks: Tracks your current daily solve streak and your all-time best streak.
• Category Progress Matrix: Colored progress bars indicating completion percentage for each section (Sorting, DP, Graphs, etc.).

4. Advanced Filters & Dynamic Sorting

• Show Only Marked Problems: Toggle the list to focus strictly on bookmarked/starred tasks (empty category headers are collapsed automatically).
• Sort by Most Solved: Sort problems in each category by popularity (total solve count) in descending order to solve the most common tasks first.
• Random Problem Selector: Redirects you to a random problem (respects your active bookmark filter!).

5. Multi-Account & Data Isolation

If you share your computer, your data is completely safe. The extension automatically detects your logged-in username from the navigation header and prefixes all local storage data, keeping your streaks, statistics, and bookmarks completely isolated per user.

How to Install (Free & Open Source)

Because the extension is free and open-source, it is not published on the Chrome Web Store (to avoid registration fees). You can install it directly in under a minute:

1. Go to the GitHub Repository Releases page: https://github.com/nisargvekariya01/CSES-Pro/releases
2. Download cses-pro-extension.zip from the latest release and extract it.
3. Open Google Chrome and go to chrome://extensions/
4. Enable Developer Mode (toggle in the top-right corner).
5. Click "Load unpacked" (top-left corner) and select the extracted folder.
6. Refresh cses.fi and you are ready to go!

Open Source & Feedback

The project is open-source. Check out the codebase, report bugs, or contribute new features here:

Link: https://github.com/nisargvekariya01/CSES-Pro

I would love to hear your thoughts, feedback, and feature suggestions in the comments below! Happy coding!