#include <bits/stdc++.h>
using namespace std;
int main(){
	int x,k,j;
	float h;
	cin>>x;
	k=x*3;
	j=k-8;
	h=(x+k+j)/3.0;
	cout<<k<<endl;
	cout<<j<<endl;
	printf("%.1f",h);
    }
/**************************************************************
	Problem: 1601
	User: tonghuawei
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/