Competitive Programming Template for C#

The template is the dotnet custom template for competitive programming.

The template includes

• Project
• Solver class

How To Use

Install

You can install the template by dotnet cli. You can download the nupkg from Releases, then install the templates using a dotnet new command.

dotnet new -i {/path/to/}AconCavy.CompetitiveProgramming.Templates.{version}.nupkg

Create Project

After installing, you can create a project using a dotnet new cpproj command. And, you can specify the project name using a -n|--name option.

dotnet new cpproj -n Sample

And, you can specify a target framework using a -f|--framework option. The default target framework is a net7.0.

The target frameworks can be specified

• net8.0
• net7.0
• net6.0
• netcoreapp3.1

dotnet new cpproj -n Sample -f net6.0

Create Solver class

After creating the project, you can create a solver class in the project. You can create the solver class using a dotnet new cpsolver command in the project.

dotnet new cpsolver -n TaskA

Then, the class named TaskA will be created.

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Numerics;

namespace Tasks;

public class TaskA
{
    public static void Main()
    {
        using var sw = new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false };
        Console.SetOut(sw);
        Solve();
        Console.Out.Flush();
    }

    public static void Solve()
    {
        // implement here!
        // var x = Console.ReadLine();
        // Console.WriteLine(x);
    }
}

Create Tests class

You can check the behavior of the solver class using NUnit test class.

using NUnit.Framework;

namespace Tests;

public class Tests
{
    [Timeout(2000)]
    [TestCase(
        @"", // input
        @"", // output
        TestName = "{m}-1")]
    public void SolverTest(string input, string output)
    {
        Utility.InOutTest(Tasks.Solver.Solve, input, output);
    }
}

You can also specify a relative error in the argument of the Utility.InOutTest method.

[Timeout(2000)]
[TestCase(
    @"1", // input
    @"0.125000000", // output
    TestName = "{m}-1")]
public void TaskATest(string input, string output)
{
    Utility.InOutTest(Tasks.TaskA.Solve, input, output, 1e-9); // relative error
}

Execution of the project

If you created multiple solver classes, you should change the StartupObject property in the {Project}.csproj to execute the specific task.

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net7</TargetFramework>

    <!--...-->

    <!-- update here -->
    <StartupObject>Tasks.TaskA</StartupObject>

  </PropertyGroup>

</Project>

Then, you can execute the solver class or tests.

dotnet run
dotnet test

Uninstall

You can uninstall the template.

dotnet new -u AconCavy.CompetitiveProgramming.Templates