static void Main()
{
List <Plant> plantsList = new List <Plant>();
int n = int.Parse(Console.ReadLine());
//read data
for (int i = 0; i < n; i++)
{
string[] input = Console.ReadLine().Split("<->", StringSplitOptions.RemoveEmptyEntries).ToArray();
Plant item = new Plant(input[0], int.Parse(input[1]), 0, 0, 0);
if (plantsList.Contains(item))
{
//If you receive a plant more than once, update its rarity
plantsList[plantsList.IndexOf(item)].Rarity = int.Parse(input[1]);
}
else
{
plantsList.Add(item);
}
}
//commands
string[] command = Console.ReadLine().Split(" ", StringSplitOptions.RemoveEmptyEntries).ToArray();
while (command[0] != "Exhibition")
{
if (command[0] == "Rate:")
{
//Rate: {plant} - {rating} – add the given rating to the plant (store all ratings)
string plantName = command[1];
double rating = double.Parse(command[3]);
bool isFound = false;
foreach (Plant item in plantsList)
{
if (item.Name == plantName)
{
item.RatingSum += rating;
item.RatingCount++;
item.AverageRating = item.RatingSum / item.RatingCount;
isFound = true;
}
}
if (!isFound)
{
Console.WriteLine("error");
}
}
if (command[0] == "Update:")
{
//Update: {plant} - {new_rarity} – update the rarity of the plant with the new one
string plantName = command[1];
int rarity = int.Parse(command[3]);
bool isFound = false;
foreach (Plant item in plantsList)
{
if (item.Name == plantName)
{
item.Rarity = rarity;
isFound = true;
}
}
if (!isFound)
{
Console.WriteLine("error");
}
}
if (command[0] == "Reset:")
{
//• Reset: {plant} – remove all the ratings of the given plant
string plantName = command[1];
bool isFound = false;
foreach (Plant item in plantsList)
{
if (item.Name == plantName)
{
item.RatingSum = 0;
item.RatingCount = 0;
item.AverageRating = 0;///???
isFound = true;
}
}
if (!isFound)
{
Console.WriteLine("error");
}
}
command = Console.ReadLine().Split(" ", StringSplitOptions.RemoveEmptyEntries).ToArray();
}
//sorting
plantsList = plantsList.OrderByDescending(x => x.Rarity).ThenByDescending(x => x.AverageRating).ToList();
//output
Console.WriteLine("Plants for the exhibition:");
foreach (Plant item in plantsList)
{
Console.WriteLine($"- {item.Name}; Rarity: {item.Rarity}; Rating: {item.AverageRating:f2}");
}
}