#include<bits/stdc++.h> 
using namespace std;
int main()
{
   float n,f,g,h;
   cin>>n;
   f=n+8;
   h=f-2;
   g=(n+f+h)/3.0;
   cout<<n<<endl;
   cout<<f<<endl;
   cout<<h<<endl;
   printf("%.1f",g);
}
/**************************************************************
	Problem: 1612
	User: yangjunwen
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/