#include <iostream>
#include <cstdio>

using namespace std;
int main(){
    float m ;
    cin>>m;
    int a=m/100;float A=m-a*100;
    int b=A/10; float B=A-b*10;
    int c=B/1;float C=B-c*1;
    int d=C/0.1;

    cout<<d<<"."<<c<<b<<a<<endl;
    return 0;

    
    
}