ZOJ2722Head-to-Head Match

#include<fstream>
#include<iostream>
#include<cmath>
using namespace std;
int main()
{
	//ifstream cin("acmilan.txt");
	double i,n,count;
	while(cin>>n)
	{
		if(n==0)
			break;
		count=0;
		for(i=0;i<32;i++)
		{
			if(pow(2,i)>=n)
			{
				count=i;
				break;
			}
		}
		cout<<count<<endl;
	}
	
	//system("pause");
	return 0;
}