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