using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;


    public class RedPill : IRedPill
    {
        
        public string WhatIsYourToken()
        {
            return "78d79446-f7b3-433f-b96c-945f2aadd1e8";
        }

        public long FibonacciNumber(long n)
        {
            try
            {
                long a = 0, b = 1, c = 1;
                for (int i = 2; i <= n; i++)
                {
                    c = a + b;
                    a = b;
                    b = c;
                }
                return c;
            }
            catch (Exception e)
            {
                return 0;
            }
        }

        public TriangleType WhatShapeIsThis(int a, int b, int c)
        {
            try
            {

                if (a > 0 && b > 0 && c > 0)
                {

                    if (a == b)
                    {
                        if (a == c)
                            return TriangleType.Equilateral;
                        else
                            return TriangleType.Isosceles;
                    }
                    else
                    {
                        if (b == c)
                            return TriangleType.Isosceles;
                        else
                            return TriangleType.Scalene;

                    }
                }
                else
                    return TriangleType.Error;
            }
            catch(Exception e)
            {
              return TriangleType.Error;
            }
        }

        public string ReverseWords(string s)
        {
            string reserseString = "";
            string[] words = s.Split(' ');

            for (int i = 0; i < words.Length; i++)
            {
                reserseString += ReverseWord(words[i]);
                if (i != words.Length - 1) // Skip add space if it is last word
                    reserseString += ' ';
            }
            return reserseString;
        }

        private string ReverseWord(string word)
        {
            string output = "";
            // Reverse word 
            for (int i = word.Length - 1; i >= 0; i--)
            {
                output += word[i];
            }

            return output;

        }
    }