#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: huxuanchen
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2072 kb
****************************************************************/