#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,y=0,z=0;
	float j;
	cin>>x;
	y=x*3;
	z=y-8;
	cout<<y<<endl<<z<<endl;
	j=(x+y+z)*1.0/3;
	printf("%.1f",j); 
}
/**************************************************************
	Problem: 1601
	User: linmiaoling
	Language: C++
	Result: Accepted
	Time:12 ms
	Memory:2072 kb
****************************************************************/