#include<stdio.h>
int main()
{
	int a,b,c;
	scanf("%d",&a);
	printf("%d\n%d\n%.1f",a*3,a*3-8,(a*7-8)*1.0/3);
	return 0;
}
/**************************************************************
	Problem: 1601
	User: admin
	Language: C
	Result: Accepted
	Time:11 ms
	Memory:1144 kb
****************************************************************/