import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int cnt = 0;
        int max = 0;
        while(n>0){
            if((n & 1) == 1){
                cnt++;
                max = Math.max(max,cnt);
            }else{
                cnt = 0;
            }
            n >>>= 1;
        }
        System.out.print(max);
    }
}