#include <iostream>
#include <iomanip>
#include <stdio.h>
#include <string>
#include <cmath>
using namespace std;

int check(int n)
{
	int s=n;
	while (s%2==0)
	{
		s/=2;

	}
	if (s==1)
		return 1;
	else
		return 0;
}

void main(void)
{
	int i=0,a[10]={0},n;
   while(1)
   {
	   cin>>n;
	   if (n==0)
		   break;
	   if (n==1)
	   {
		   a[i]=1;
	   }
	   else
	   {
	   if (check(n)==1)
	     a[i]=(int)(log((double)n)/log(2.0));
	   else
		   a[i]=(int)(log((double)n)/log(2.0)+1);
	   }
	   i++;

   }
   for (int j=0;j<i;j++)
	   printf("%d \n",a[j]);
}