#include<iostream>
#include <iomanip>
using namespace std;
int main(){
	int x;
	cin>>x;
	cout<<x*3<<endl;
	cout<<x*3-8<<endl;
	cout<<fixed<<setprecision(1)<<(x*3+x*3-8+x)/3.0<<endl;
} 
/**************************************************************
	Problem: 1601
	User: admin
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/