#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,a,b;
	float c;
	cin>>n;
	a=n*3;
	b=a-8;
	cout<<a<<endl<<b<<endl;
	c=(a+b+n)*1.0/3.0;
	printf("%.1f",c);
}
/**************************************************************
	Problem: 1601
	User: panyuchen
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/