#include <iostream>
#include <iomanip>
#include <cmath>

using namespace std;

int main(){
	double s=100,c=0;
	for(int i=1;i<=1000000;i++){
		if(s>=0.5){
			s/=2;
			c++;
		}else{
			cout<<c;
			break;
		}
	}
}
/**************************************************************
	Problem: 1062
	User: admin
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/