#include<bits/stdc++.h>
using namespace std;
int main(){
	float m;
	cin>>m;
	int a=m/100;
	int b=(m-a*100)/10;
	int c=m-a*100-b*10;
    int d=((m*10)-a*1000-b*100-c*10);
    cout<<d+c*0.1+b*0.01+a*0.001<<endl;
	return 0;
}