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

/**************************************************************
	Problem: 1062
	User: zengyixuan
	Language: C++
	Result: Accepted
	Time:3 ms
	Memory:2072 kb
****************************************************************/