#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,y,z;
	double ans;
	cin>>x;
	y=3*x;
	z=y-8;
	ans=(x+y+z)/3.0;
	cout<<y<<endl<<z<<endl;
	printf("%.1f",ans);
}



/**************************************************************
	Problem: 1601
	User: zhuangsongyu
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/