Zad1

//ZAD 1
int n = int.Parse(Console.ReadLine());
string time = Console.ReadLine();

double taxiPricePerKm = 0.79;
double busPricePerKm = 0.09;
double trainPricePerkm = 0.06;

if (time == "night")
{
    taxiPricePerKm = 0.90;
}


if (n >= 100)
{
    Console.WriteLine($"{n * trainPricePerkm:f2}");
}
else if (n >= 20 && n < 100)
{
    Console.WriteLine($"{n * busPricePerKm:f2}");
}
else
{
    Console.WriteLine($"{n * taxiPricePerKm + 0.7:f2}");
}