#include<bits/stdc++.h>
using namespace std;

int main(){
    float a;
    int a1,a2,a3,a4;
    cin >> a;
    a1=int(a*10)/1000;
    a2=int(a*10)%1000/100;
    a3=int(a*10)%100/10;
    a4=int(a*10)%10;
    cout <<a4<< a3<< a2 <<"." <<a1;
    return 0;
}

测试点是114.5，我本地跑的是541.1，到洛谷上就是5.411