import java.io.*;
import java.util.*;
 
public class Main{
	//3, 5, 17, 257
	int a[] = {1, 3,  5, 15, 17, 51, 85, 257, 771, 1285, 1445, 3855, 4369, 13107, 21845, 371365};
	int aa[] = {3, 5, 17, 257, 65537};
 
	public void solve(){
		long[] a = new long[1000];
		int len = 1;
		a[0] = 1;
		for(int i = 0; i < aa.length; i++){
			int l = len;
			for(int j = 0; j < len; j++){
				a[l++] = a[j] * aa[i];
			}
			len = l;
		}
		
		
		int A = nextInt();
		int ans = -2;
		//ArrayList<Integer> res = new ArrayList<>();
		for(int i = 0; i < len; i++){
			long base = 1;
			while (a[i] * base <= A){
				ans++;
				//res.add((int) (a[i] * base));
				base *= 2;
			}
		}
		//Collections.sort(res);
		//out.println(res);
		out.println(ans);
	}
	
	private static PrintWriter out;
	public static void main(String[] args){
		out = new PrintWriter(System.out);
		new Main().solve();
		out.flush();
	}
	
	
	
	public static int nextInt(){
		int num = 0;
		String str = next();
		boolean minus = false;
		int i = 0;
		if(str.charAt(0) == '-'){
			minus = true;
			i++;
		}
		int len = str.length();
		for(;i < len; i++){
			char c = str.charAt(i);
			if(!('0' <= c && c <= '9')) throw new RuntimeException();
			num = num * 10 + (c - '0');
		}
		return minus ? -num : num;
	}
	
	public static long nextLong(){
		long num = 0;
		String str = next();
		boolean minus = false;
		int i = 0;
		if(str.charAt(0) == '-'){
			minus = true;
			i++;
		}
		int len = str.length();
		for(;i < len; i++){
			char c = str.charAt(i);
			if(!('0' <= c && c <= '9')) throw new RuntimeException();
			num = num * 10l + (c - '0');
		}
		return minus ? -num : num;
	}
	public static String next(){
		int c;
		while(!isAlNum(c = read())){}
		StringBuilder build = new StringBuilder();
		build.append((char)c);
		while(isAlNum(c = read())){
			build.append((char)c);
		}
		return build.toString();
	}
	
	
	private static byte[] inputBuffer = new byte[1024];
	private static int bufferLength = 0;
	private static int bufferIndex = 0;
	private static int read(){
		if(bufferLength < 0) throw new RuntimeException();
		if(bufferIndex >= bufferLength){
			try{
				bufferLength = System.in.read(inputBuffer);
				bufferIndex = 0;
			}catch(IOException e){
				throw new RuntimeException(e);
			}
			if(bufferLength <= 0) return (bufferLength = -1);
		}
		return inputBuffer[bufferIndex++];
	}
	
	private static boolean isAlNum(int c){
		return '!' <= c && c <= '~';
	}
}