cp.nvim

The definitive competitive programming environment for Neovim

Scrape problems, run tests, and debug solutions across multiple platforms with zero configuration.

Screen.Recording.2025-10-24.at.9.29.14.PM.mov

Features

• Multi-platform support: AtCoder, CodeChef, Codeforces, and CSES
• Automatic problem setup: Scrape test cases and metadata in seconds
• Dual view modes: Lightweight I/O view for quick feedback, full panel for detailed analysis
• Test case management: Quickly view, edit, add, & remove test cases
• Rich test output: 256 color ANSI support for compiler errors and program output
• Language agnostic: Works with any language
• Diff viewer: Compare expected vs actual output with 3 diff modes

Optional Dependencies

• uv for problem scraping
• GNU time and timeout

Quick Start

cp.nvim follows a simple principle: solve locally, submit remotely.

Basic Usage

1. Find a contest or problem

2. Set up contests locally

   :CP codeforces 1848
   

3. Code and test

   :CP run
   

4. Navigate between problems

   :CP next
   :CP prev
   :CP e1
   

5. Debug and edit test cases

:CP edit
:CP panel --debug

5. Submit on the original website

Documentation

:help cp.nvim

See my config for the setup in the video shown above.

Motivation

I could not find a neovim-centric, efficient, dependency-free, flexible, and easily customizable competitive programming workflow that "just works"--so I made it myself. I conferenced with top competitive programmers at Carnegie Mellon Univerity and the University of Virginia and covered their (and my) pain points:

• Scraping: contests are automatically loaded asynchronously
• Test Case Management: test case editor (:CP edit)
• UI: both run and panel layouts cover common formats
• Extensibility: snippet plugins, compilation, etc. are left to the programmer

Similar Projects

• competitest.nvim
• assistant.nvim