#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,a,c;
	cin>>x;
	a=3*x;
	c=a-8;
	cout<<a<<endl<<c<<endl;
	printf("%.1f",(a+c+x)/3.0);
}
/**************************************************************
	Problem: 1601
	User: lvrenxiang
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/