#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: linzihang
	Language: C++
	Result: Accepted
	Time:12 ms
	Memory:2072 kb
****************************************************************/