#include <iostream>
#include <string>
using namespace std;

int main() {

	string daysAsText, typeRoom, review;

	getline(cin, daysAsText);
	getline(cin, typeRoom);
	getline(cin, review);

	int days = stoi(daysAsText);
	double price = 0;
	int nights = days - 1;

	if (typeRoom == "room for one person")
	{
	if		(days < 10)					price = nights * 18.00;
	else if (days >= 10 && days <= 15)  price = nights * 18.00;
	else if (days > 15)					price = nights * 18.00;
	}

	else if (typeRoom == "apartment")
	{
		if		(days < 10)					price = nights * 25.00 * 0.7;
		else if (days >= 10 && days <= 15)  price = nights * 25.00 * 0.65;
		else if (days > 15)					price = nights * 25.00 * 0.5;
	}

	else if (typeRoom == "president apartment")
	{
		if		(days < 10)					price = nights * 35.00 * 0.9;
		else if (days >= 10 && days <= 15)  price = nights * 35.00 * 0.85;
		else if (days > 15)					price = nights * 35.00 * 0.8;
	}

	cout.setf(ios::fixed);
	cout.precision(2);

	if		(review == "positive") cout << price * 1.25;
	else if (review == "negative") cout << price * 0.9;



	return 0;
}