CodeforcesAPI

Codeforces API declaration for .NET

Examples

List active users

static void Main()
{
    var api = new Codeforces(Langs.EN);
    foreach (var user in api.User.RatedList(true).Result)
    {
        Console.WriteLine("{0} - {1} ({2})", user.Handle, user.Rating, user.Rank);
    }
}

List unfinished contests

static void Main()
{
    var api = new Codeforces(Langs.EN);
    foreach (var contest in api.Contest.List().Result.Where(x => x.Phase != ContestPhase.Finished))
    {
        Console.WriteLine("{0} - {1}", contest.StartTime, contest.Name);
    }
}

Auth with apikey

static void Main()
{
    var apiKey = new ApiKey("MYKEY", "MYSECRET");
    var api = new Codeforces(Langs.EN, apiKey);
    foreach (var contest in api.Contest.List(true).Result.Where(x => x.Phase != ContestPhase.Finished))
    {
        Console.WriteLine("{0} - {1}", contest.StartTime, contest.Name);
    }
}

Analyze contest submissions

static void Main()
{
    var api = new Codeforces(Langs.EN);
    var contest = api.Contest.List(false).Result.Where(x => x.Id == 629).First();
    var submissions = api.Contest.Status(629).Result;
    var contestSubmissions = submissions.Where(x => x.CreationTime >= contest.StartTime && x.CreationTime <= contest.StartTime.AddSeconds(contest.DurationSeconds));
    var problems = new Dictionary<string, List<Submission>>();
    foreach(var submission in contestSubmissions)
    {
        List<Submission> subs;
        if (!problems.TryGetValue(submission.Problem.Index, out subs))
        {
            subs = new List<Submission>();
            problems[submission.Problem.Index] = subs;
        }
        subs.Add(submission);
    }
    foreach(var problem in problems.OrderBy(x => x.Key))
    {
        var count = problem.Value.Count;
        var accepted = problem.Value.Where(x => x.Verdict == SubmissionVerdict.OK).Count();
        Console.WriteLine("{0}: {1} {2}", problem.Key, count, accepted);
    }
}