#include<bits/stdc++.h>
using namespace std;
int main(){
	double h=100;
	int sum=0;
	int i=1;
	do{
		h=h/2;
	    sum++;
		i++;
	}while(h>0.5);
	cout<<sum;
	return 0;
}

/**************************************************************
	Problem: 1062
	User: zouliangyin
	Language: C++
	Result: Accepted
	Time:3 ms
	Memory:2072 kb
****************************************************************/