import java.util.Scanner;

public class Main47 {
	public static void main(String[] args) {
		Main47 p = new Main47();
	}

	public Main47() {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		solve(n);
	}

	public void solve(int n) {
		if(Integer.bitCount(n)==1)
			System.out.println(31-Integer.numberOfLeadingZeros(n));
		else
			System.out.println(31-Integer.numberOfLeadingZeros(n)+1);
	}

}