#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,z,x;
    cin>>n;
    z=n+8;
    x=z-2;
    cout<<n<<endl<<z<<endl<<x<<endl;
    printf("%.1f",(x+n+z)/3.0);
    
	
	
}
/**************************************************************
	Problem: 1612
	User: lvrenxiang
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/