#include<bits/stdc++.h>
using namespace std;
int r,f,s;
double p;
int main(){
	cin>>r;
	f=r*3;
	s=f-8;
	p=(r+f+s)/3.0;
	cout<<f<<endl<<s<<endl<<fixed<<setprecision(1)<<p;
}
/**************************************************************
	Problem: 1601
	User: zhangziang
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/