#include <bits/stdc++.h>
using namespace std;
int main(){
    int a,s,d;
	cin>>a;
	s=a*3;
	d=s-8;
	float f;
	f=(a+s+d)/3.0;
	cout<<s<<endl<<d<<endl;
	printf("%.1f",f);
	 
}

/**************************************************************
	Problem: 1601
	User: huangluowei
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/