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

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