/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

class Solution {
	public int solution(int N) {
		int bitmask = 0x1FFFFFFF, bitpos = 29;
		while((N & bitmask) != 0) {
			bitmask >>= 1;
			bitpos--;
		}
		return bitpos;
	}
}

public class Main
{
	public static void main (String[] args)
	{
		Solution s = new Solution();
		System.out.println(s.solution(24));
	}
}