#include <bits/stdc++.h>
using namespace std;
int main(){
	float a=100;
	int b=0;
	while(a>=0.5)
	{
		a/=2 ;b++;
	}
	cout<<b; 
	return 0;
	}

/**************************************************************
	Problem: 1062
	User: ljl2
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/