using System;

using System.Collections.Generic;

using System.Linq;

​

public enum Element

{

    Atlanta,

    Banana,

    Cheese,

    Domino,

    Elephant,

    Freedom,

    Government,

    Hurricane,

    Lovecraft

}

​

public class Observation

{

    public DateTime Time { get; private set; }

    public Element Value { get; private set; }

​

    public Observation(DateTime time, Element element)

    {

        Time = time;

        Value = element;

    }

}

public class Program

{

    private static IEnumerable<IEnumerable<Observation>> sequences;

​

    public static void OneTimeSetUp()

    {

        var measureStartPoint = new DateTime(2017, 8, 30, 8, 40, 0);

        var m1s = measureStartPoint.AddSeconds(1);

        var m2s = measureStartPoint.AddSeconds(2);

        var m3s = measureStartPoint.AddSeconds(3);

        var m4s = measureStartPoint.AddSeconds(4);

        var m5s = measureStartPoint.AddSeconds(5);

        sequences = new[]

​

        {

            new Observation[] { new Observation(measureStartPoint, Element.Atlanta), new Observation(m1s, Element.Banana), new Observation(m3s, Element.Banana), new Observation(m4s, Element.Atlanta) },

            new Observation[] { new Observation(measureStartPoint, Element.Elephant), new Observation(m4s, Element.Domino), new Observation(m5s, Element.Elephant) },

            new Observation[] { },

            new Observation[] { new Observation(m1s, Element.Elephant), new Observation(m2s, Element.Elephant), new Observation(m3s, Element.Domino) },

            new Observation[] { new Observation(m4s, Element.Lovecraft) },

            new Observation[] { new Observation(measureStartPoint, Element.Atlanta), new Observation(m1s, Element.Cheese) },

            new Observation[] { new Observation(measureStartPoint, Element.Banana), new Observation(m2s, Element.Banana) },

            new Observation[] { new Observation(measureStartPoint, Element.Freedom), new Observation(m2s, Element.Freedom), new Observation(m4s, Element.Freedom) },

            new Observation[] { new Observation(m1s, Element.Government), new Observation(m4s, Element.Atlanta), new Observation(m5s, Element.Hurricane) },

            new Observation[] { new Observation(measureStartPoint, Element.Cheese), new Observation(m1s, Element.Banana), new Observation(m2s, Element.Lovecraft),  new Observation(m3s, Element.Banana), new Observation(m4s, Element.Freedom)},

            new Observation[] { new Observation(m3s, Element.Banana) },

            new Observation[] { new Observation(m1s, Element.Banana) },

            new Observation[] { new Observation(m1s, Element.Domino), new Observation(m3s, Element.Domino), new Observation(m3s, Element.Freedom) },

            new Observation[] { new Observation(measureStartPoint, Element.Hurricane), new Observation(m5s, Element.Elephant) },

            new Observation[] { new Observation(m1s, Element.Atlanta) },

            new Observation[] { new Observation(measureStartPoint, Element.Lovecraft), new Observation(m2s, Element.Atlanta) },

            new Observation[] { new Observation(measureStartPoint, Element.Lovecraft), new Observation(m2s, Element.Atlanta),  new Observation(m3s, Element.Cheese) },

            new Observation[] { new Observation(measureStartPoint, Element.Lovecraft), new Observation(m1s, Element.Atlanta),  new Observation(m4s, Element.Cheese) },

            new Observation[] { new Observation(m2s, Element.Banana), new Observation(m4s, Element.Banana) },

            new Observation[] { new Observation(m1s, Element.Atlanta),  new Observation(m2s, Element.Cheese)}

        };

    }

    public static void Main()

    {       

        OneTimeSetUp();

        TestExampleFirstSequenceLength();

        TestLongestSequenceLength();

        TestAtlantaObservations();

        TestMostFrequentLenghtOfSequence();

    }

    /// <summary>

    /// Example. What is length of first sequence?

    /// </summary>

    public static void TestExampleFirstSequenceLength()

    {

        var result = sequences.First().Count();

​

        if(result == 4)

            Console.WriteLine("TestExampleFirstSequenceLength pass");

        else

            Console.WriteLine("TestExampleFirstSequenceLength fail");

    }

​

    /// <summary>

    /// What is the longest sequence length?

    /// </summary>

    public static void TestLongestSequenceLength()

    {

        //Code here

​

        var result = default(int);

​

        //End code

        if(result == 5)

            Console.WriteLine("TestLeastSequenceLength pass");

        else

            Console.WriteLine("TestLeastSequenceLength fail");

    }

​

    /// <summary>

    /// How many `Observations` with `Atlanta` element is in all sequences?

    /// </summary>

    public static void TestAtlantaObservations()

    {

        //Code here

​

        var result = default(int);

        //End code

​

        if(result == 9)

            Console.WriteLine("TestSequenceObservations pass");

        else

            Console.WriteLine("TestSequenceObservations fail");

    }

​

    /// <summary>

    /// What is the most frequent lenght of sequence?

    public static void TestMostFrequentLenghtOfSequence()

    {

        //Code here

​

        var result = default(int);

​

        //End code

​

        if(result == 3)

            Console.WriteLine("TestMostFrequentLenghtOfSequence pass");

        else

            Console.WriteLine("TestMostFrequentLenghtOfSequence fail");

    }

}