import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while (in.hasNext()) {
            int key = in.nextInt();
            String s = Integer.toBinaryString(key);
            String[] split = s.split("0");
            int count[] = new int[150];
            for (int i = 0; i < split.length; i++) {
                int length = split[i].length();
                count[i] = length;
            }
            Arrays.sort(count);
            System.out.println(count[count.length - 1]);
        }
    }
} 


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