using System;  

  public class FibonacciExample  

   {  

     public static void Main(string[] args)  

      {  

         //int n1=0,n2=1,n3,i,number;    

         //Console.Write("Enter the number of elements: ");    

         //number = int.Parse(Console.ReadLine());  

         //Console.Write(n1+" "+n2+" "); //printing 0 and 1    

         //for(i=2;i<number;++i) //loop starts from 2 because 0 and 1 are already printed    

        // {    

         // n3=n1+n2;    

         // Console.Write(n3+" ");    

         // n1=n2;    

         // n2=n3;    

        // }    

         int n1=0,n2=1,n3,number;    

         Console.Write("Enter the number: ");    

         number = int.Parse(Console.ReadLine());  

         Console.Write(n1+" "+n2+" "); //printing 0 and 1    

         n3 = n2;

         while(n3 < number) //loop starts from 2 because 0 and 1 are already printed    

         {    

          n3=n1+n2; 

             if(n3 < number) {

                 Console.Write(n3+" ");  

             }

          n1=n2;    

          n2=n3;    

         }    

      }  

   }