#include<bits/stdc++.h>
using namespace std;
int main(){
	int x;
	cin>>x;
	cout<<x*3<<endl<<x*3-8<<endl;
	printf("%.1f",(x+x*3+x*3-8)/3.0);
	
}
/**************************************************************
	Problem: 1601
	User: baizhoudeyueguang
	Language: C++
	Result: Accepted
	Time:13 ms
	Memory:2072 kb
****************************************************************/