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

/**************************************************************
	Problem: 1062
	User: xiaojingxuan
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2072 kb
****************************************************************/