#include<bits/stdc++.h>
using namespace std;
int main(){
    int x;
    float y=0,b=0,p=0;
    cin>>x;
        y=x+8;
        b=y-2;
        p=(x+y+b)/3;
        cout<<x<<endl<<y<<endl<<b<<endl<<fixed<<setprecision(1)<<p;
    }
/**************************************************************
	Problem: 1612
	User: linyuhang
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/