#include <bits/stdc++.h>
using namespace std;
int main() {
	int x,a,b;
	float p;
	cin>>x;
	a=x*3;
	b=a-8;
	p=(x+a+b)/3.0;
	printf("%d\n%d\n%.1f",a,b,p);
    return 0;
}
/**************************************************************
	Problem: 1601
	User: fuhoubin
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/