calcul total price after discount with smallest price

 calcul total price after discount with smallest price

public static int CalculateTotalPrice(int[] prices, int discount)

    {

        // Write your code here

        // To debug: Console.Error.WriteLine("Debug messages...");

        if(discount < 0 || discount > 100 || prices.Length <= 0 || prices.Length >=100){

            throw new ArgumentException("invalid input!");

        }

        

        double total = 0.0;

        Array.Sort(prices);

        for (int i = 1; i< prices.Length ; i++){

            //Console.WriteLine(prices[i]);

            if(prices[i] <= 0 || prices[i] >= 100000){

                throw new ArgumentException("invalid price!");

            }

            total = total + prices[i];

        }

        double toReturn = total + prices[0] * ((double)(100 - discount)/100);

        

        return (int)toReturn;

    }