#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,y,z;
	float p;
	cin>>x;
	y=x*3;
	z=y-8;
	p=(x+y+z)/3.0;
	printf("%d\n%d\n%.1f",y,z,p);
}
/**************************************************************
	Problem: 1601
	User: xiaojingxuan
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/