import java.util.Scanner;
public class Main {
        public static void main(String[] args){
            Scanner sc = new Scanner(System.in);
            while(sc.hasNext()){
                int n = sc.nextInt();
                //转化成二进制串
                String str = Integer.toBinaryString(n);
                //对0进行分割,将连续的1都存到数组里
                String[] arr =str.split("0");
                int max=0;
                for(String s :arr){
                    max=s.length()>max?s.length():max;
                }
                System.out.println(max);
            }
        }
}