mport java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.*;
public class Solution {
private static final Scanner scanner = new Scanner(System.in);
public static void main(String[] args) {
int n = scanner.nextInt();
scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
String binary = Integer.toString(n,2);
int max_numberOfOnes = 0;
int numberOfOnes = 0;
for(int i=0; i<binary.length(); i++){
if(binary.charAt(i) == '1') numberOfOnes += 1;
else{
//we have a 0
if (max_numberOfOnes < numberOfOnes){
max_numberOfOnes = numberOfOnes;
}
numberOfOnes = 0;
}
}