using System;

using System.Linq;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        Test(100, 2, new [] { Range(0, 49), Range(50, 100) });

        Test(100, 3, new [] { Range(0, 32), Range(33, 65), Range(66, 100) });

        Test(101, 3, new [] { Range(0, 32), Range(33, 65), Range(66, 101) });

        Test(2, 3, new [] { Range(0, 2) });

        Test(0, 3, new Tuple<int, int>[] { });

    }

    public static void Test(int length, int chunkCount, IEnumerable<Tuple<int, int>> expected)

    {

        var result = Split2(length, chunkCount);

        if (!expected.SequenceEqual(result))

        {

            Console.WriteLine($@"

length={length}, chunkCount={chunkCount}

Expected: [{String.Join(", ", expected)}] 

Got: [{String.Join(", ", result)}

");

        }

    }

    public static Tuple<int, int> Range(int it1, int it2)

    {

        return new Tuple<int, int>(it1, it2);

    }

​

    public static IEnumerable<Tuple<int, int>> Split2(int length, int chunkCount)

    {

        int chunkSize = length / chunkCount;

        for (int i = 0; i < chunkCount; i++)

        {

            int startPos = chunkSize * i;

            int endPos = i == chunkCount - 1 ? length : (startPos + chunkSize - 1);

            yield return new Tuple<int, int>(startPos, endPos);

        }

    }

}