import java.util.Scanner;


public class Main_yukicoder237 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int a = sc.nextInt();

        long[] num = {2, 4, 16, 256, 65536, 3, 5, 17, 257, 65537};
        
        int ret = 0;
        for (int i = 1; i < 1 << num.length; i++) {
        	long tmp = 1;
        	for (int j = 0; j < num.length; j++) {
        		if ((i & (0x1 << j)) != 0) {
        			tmp *= num[j];
        		}
        	}
        	if (tmp <= a) {
        		ret++;
        	}
        }
        
        System.out.println(ret - 1);
        
        sc.close();
    }
}