import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        int num = in.nextInt();

        int count = 0;

        for(int i=1; i<=num; i++){
            int result = 0;
            for(int j=1; j<i; j++){
                if(i%j == 0){
                    result += j;
                }
                if(result > i){
                    break;
                }
            }
            if(i == result){
                count++;
            }
        }

        System.out.print(count);
    }
}