#include <bits/stdc++.h>
using namespace std;
int main(){
	float a=100,f=0;
	while(a>=0.5){
		a=a/2;
		f=f+1;
	}
	cout<<f;
}
/**************************************************************
	Problem: 1062
	User: toughuatao1
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/