#include<bits/stdc++.h>
using namespace std;

int main(){
    int a,b,c;
    double d;
    cin>>a;
    b=a+8;
    c=b-2;
    d=(a*1.0+b+c)/3;
    cout<<a<<endl<<b<<endl<<c<<endl;
    cout << fixed << setprecision(1) << d<<endl;
    return 0;
}