using System;

public class Program

{

    public static void Main()

    {

         int i,count,k;

         int count2=0;

         Console.WriteLine("enter the number");

         int n= Convert.ToInt32(Console.ReadLine());

         for(i=3;i<=n;i++)

            {

                count=0;

                for(int j=1;j<=i;j++)

                {

                    if(i%j==0)

                    count++;

                }

                if(count==2)

                {

                    int sum=0;

                    for(k=2;k<i;k++)

                    {

                        int count1=0;

                        for(int j=1;j<=k;j++)

                        {

                            if(k%j==0)

                            count1++;

                        }

                        if(count1==2)

                        sum=sum+k;

                        if(sum==i)

                        {

                            count2++;

                            break;

                        }

                        if(sum>i)

                        break;

                    }   

               }

           }

           Console.WriteLine("the total numbers are {0}",count2);

    }

}