#include <iostream>
#include <string>
#include <cmath>

using namespace std;

int main()
{
	int days;
	cin >> days;
	cin.ignore();
	string roomType;
	getline(cin, roomType);
	string grade;
	cin >> grade;

	int nights = days - 1;
	double allPrice = 0.0;

	if (roomType == "room for one person")
	{
		if (days < 10 || days >= 10 && days <= 15 || days > 15)
		{
			allPrice = nights * 18.00;
		}
	}
	else if (roomType == "apartment")
	{
		allPrice = nights * 25.00;

		if (days < 10)
		{
			allPrice = (nights * 25.00) - (allPrice * 0.30);
		}
		else if (days >= 10 && days <= 15)
		{
			allPrice = (nights * 25.00) - (allPrice * 0.35);
		}
		else if (days > 15)
		{
			allPrice = (nights * 25.00) - (allPrice * 0.50);
		}
	}
	else if (roomType == "president apartment")
	{
		allPrice = nights * 35.00;

		if (days < 10)
		{
			allPrice = (nights * 35.00) - (allPrice * 0.10);
		}
		else if (days >= 10 && days <= 15)
		{
			allPrice = (nights * 35.00) - (allPrice * 0.15);
		}
		else if (days > 15)
		{
			allPrice = (nights * 35.00) - (allPrice * 0.20);
		}
	}

	if (grade == "positive")
	{
		allPrice = allPrice + allPrice * 0.25;
	}
	else if (grade == "negative")
	{
		allPrice = allPrice - allPrice * 0.10;
	}

	cout.setf(ios::fixed);
	cout.precision(2);
	cout << allPrice << endl;

	return 0;
}