using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("result 0: " + GetPercentageRounds(0.0));

        Console.WriteLine("result 1: " + GetPercentageRounds(0.01));

        Console.WriteLine("result 2: " + GetPercentageRounds(0.12));

        Console.WriteLine("result 3: " + GetPercentageRounds(0.23));

        Console.WriteLine("result 4: " + GetPercentageRounds(0.34));

        Console.WriteLine("result 5: " + GetPercentageRounds(0.45));

        Console.WriteLine("result 6: " + GetPercentageRounds(0.55));

        Console.WriteLine("result 7: " + GetPercentageRounds(0.66));

        Console.WriteLine("result 8: " + GetPercentageRounds(0.77));

        Console.WriteLine("result 9: " + GetPercentageRounds(0.88));

        Console.WriteLine("result10: " + GetPercentageRounds(0.99));

        Console.WriteLine("result10: " + GetPercentageRounds(1.00));

​

​

    }

    private static string GetPercentageRounds(double percentage)

    {

        var symbol = 'O';

        return percentage >= 1.0 ? new string(symbol, 10) : new string(symbol, (int)Math.Ceiling(percentage*10));

    }

}