zoj 2417.Lowest Bit

#include <fstream>
#include <iostream>
#include <cmath>
using namespace std;
int main(int argc, char* argv[])
{
//	ifstream cin("aaa.txt");
int n,num;
while(cin>>n)
{
num=0;
if(n==0)break;
while(n%2!=1)
{
num++;
n=n/2;
}
cout<<pow(2.0,num*1.0)<<endl;
}
return 0;
}