static void Main(string[] args)
{
int n = int.Parse(Console.ReadLine());
Seals[] seal = new Seals[n];
var register = new SortedDictionary <string, decimal>();
for (int i = 0; i < n; i++)
{
seal[i] = ReadSeal();
if (register.ContainsKey(seal[i].town) == false)
{
register.Add(seal[i].town, 0);
}
register[seal[i].town] += seal[i].price * seal[i].quantity;
}
foreach (var currentTown in register)
{
Console.WriteLine($"{currentTown.Key} -> {currentTown.Value:f2}");
}
}
static Seals ReadSeal()
{
string[] sale = Console.ReadLine().Split().ToArray();
Seals singleSale = new Seals()
{
town = sale[0], product = sale[1], price = decimal.Parse(sale[2]), quantity = decimal.Parse(sale[3])
};
return(singleSale);
}