#include<bits/stdc++.h>
using namespace std;
int main(){
  int s=0;
  float i=100.0;
  while(i>=0.5){
  i=i/2.0;
  s++;
  } 
  cout<<s;
  return 0;
}

/**************************************************************
	Problem: 1062
	User: wtq001
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/