using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
    
    [ServiceContract]
    public interface IRedPill
    {
        [OperationContract]
        string WhatIsYourToken();

        [OperationContract]
        long FibonacciNumber(long n);

        [OperationContract]
        TriangleType WhatShapeIsThis(int a, int b, int c);

        [OperationContract]
        string ReverseWords(string s);

        // TODO: Add your service operations here
    }
        
    [DataContract]
    public enum TriangleType : int
    {
        [EnumMember]
        Error = 0,
        [EnumMember]
        Equilateral = 1,
        [EnumMember]
        Isosceles = 2,
        [EnumMember]
        Scalene = 3
    }