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


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