#include <bits/stdc++.h> 
using namespace std;
int main(){
	float i=100,h=0;
	while(i>=0.5){
		i=i/2;
		h=h+1;
	}
	cout<<h;
}
/**************************************************************
	Problem: 1062
	User: sucongyi
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2072 kb
****************************************************************/