#include<iostream>
#include<math.h>	
using namespace std;
int main(){
     float n=0.625;
	cin>>n;
	cout<<"0.";
	while(n){
		n*=2;
		if(n>=1){
			n-=1;
			cout<<1;
		}else{
			cout<<0;
		}
	}
	return 0;
}