#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,a=0,b=0;
	float j=0;
	cin>>n;
	a=n+8;
    b=a-2;
    cout<<n<<endl<<a<<endl<<b<<endl;
    j=(n+a+b)*1.0/3;
    printf("%.1f",j);
}
/**************************************************************
	Problem: 1612
	User: linmiaoling
	Language: C++
	Result: Accepted
	Time:16 ms
	Memory:2072 kb
****************************************************************/