#include<iostream>
  
using namespace std;
  
int main()
  
  {
  
	double a,h,s;
    
	int b,c,d,x;
    
	cin>>a;
    
	b=a/100;
    
	c=a%100/10;
    
	d=a%100%10;
    
	h=a-(b+c+d);
    
	s=h*10+d*0.1+c*0.01+b*0.001;
    
	cout<<s<<endl;
    
	return 0;
}