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