#include<bits/stdc++.h>
using namespace std;
int main(){
	int i;
	float x=0,z=0,p;
	cin>>i;
	x=i*3;
	z=x-8;
	cout<<x<<endl<<z<<endl;
	p=(x+i+z)/3;
	printf("%.1lf",p);
} 
/**************************************************************
	Problem: 1601
	User: huxuanchen
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2072 kb
****************************************************************/