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