#include<bits/stdc++.h>
using namespace std;
int x;
double i=100; 
int main(){
	do{
		i=i/2.0;
		x++;
	}while(i>=0.5);
	cout<<x;
	return 0;
}

/**************************************************************
	Problem: 1062
	User: zhangziang
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/