#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: chenmingyu
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/