---
task_categories:
- text-generation
language:
- en
tags:
- codeforces
- coding
- code generation
- programming contests
pretty_name: Codeforces Contests
size_categories:
- 10M<n<100M
---
## Dataset Description

- **Homepage:** None
- **Repository:** <https://huggingface.co/datasets/Nan-Do/codechef_start_contests>
- **Paper:** None
- **Leaderboard:** None
- **Point of Contact:** [@Nan-Do](https://github.com/Nan-Do)

### Dataset Summary

- **This dataset is an extension of the one found** [here](https://huggingface.co/datasets/open-r1/codeforces-submissions) adding the problem data for each submission, including things like the statement, title, difficulty, etc...
- This dataset aims to **facilitate the creation of sophisticated, multi-turn dialogue datasets focused on coding**
  that could be used for **training reasoning Large Language Models (LLMs)**, particularly for **Supervised Fine-Tuning (SFT) and Knowledge Distillation** techniques. 
- It also serves as a **robust foundation for problem-solving** in Large Language Models (LLMs).
- The dataset includes both **accepted and failed solutions** from [Codeforces](https://www.codeforces.com) contests.
- It covers contests up to contest **Codeforces Round 1004** **(Feb 11, 2025)**.
- In total, it features **10385 unique problems**, **1879 contests** and **11,949,042 submissions** across over **60 different programming languages** (including different compiling environments for each language).

  (**The dataset is not accessible to the public, please do not contact me regarding its access.**)

### Languages

The problem descriptions are in English.
The dataset includes submissions in various programming languages (one language can have more than one compiler/interpreter available).  
Here is a table with the 10 most used languages.

Lang| 
:--------
C++17 (GCC 7-32)
C++14 (GCC 6-32)
GNU C++11
GNU C++
Python 3
C++17 (GCC 9-64)
Java 8
PyPy 3
MS C++
C++20 (GCC 11-64)



## Verdict

The verdict indicates the outcome of each submission.
It contains the result or a score based on the total solved subtasks for the given problem.  
Here is a table showing some of the possible results.

Result| 
:--------
OK
WRONG_ANSWER
TIME_LIMIT_EXCEEDED
RUNTIME_ERROR
COMPILATION_ERROR
CHALLENGED
MEMORY_LIMIT_EXCEEDED
SKIPPED


### Data Splits

There are no splits (Only training).

## Dataset Creation

Aug of 2025


### Source Data

The source of the dataset is [Codeforces's contests](https://www.codeforces.com)

### Annotations

The dataset includes the following columns:

- **contest_number**: contest number (e.g. 1024).
- **letter**: letter given to a problem for a give contest (e.g. A).  
              Can also contain a number if the problem has versions with different constraints (e.g. F1, F2).
- **statement**: markdown explanation of the problem.
- **difficulty**: difficulty given to a problem (e.g. 1200).
- **title**: title of the problem.
- **language**: programming language used for the solution (see previous table for details).
- **verdict**: outcome of the submission (see previous table for details).
- **passed_test_count**: number of tests passed by the submission.
- **execution_time**: time taken by the submission in milliseconds
- **execution_memory**: memory used by the submission in kilobytes.
- **creation_time**: unix time of the creation of the submission.
- **code**: code of the submission.

If you have any suggestion, comment or proposal, please contact me [here](mailto:tarin.f@gmail.com)