import java.util.*;
public class Main{
    public static void main(String[] args){
         Scanner sc=new Scanner(System.in);
         while(sc.hasNext()){
             int n=sc.nextInt();
             int count=0;
             for(int i=1;i<=n;i++){       
                int sum=0;
                for(int j=1;j<=i/2;j++){
                    if(i%j==0){
                    sum+=j;
                    }
                 }
                 if(sum==i){
                     count++;
                 }
             }
            System.out.println(count);
         }
    }
}