using System;

using System.Text;

public class Program

{

    private static StringBuilder sb = new StringBuilder();

    private static string GetPercentageRounds(double percentage)

    {

        int filled = (int)(percentage * 10);

        sb.Clear();

        for (int i = 0; i < 10; ++i)

        {

            sb.Append(i < filled ? "🔵" : "⚪");

        }

        return sb.ToString();

    }

    public static void Main()

    {

        Console.WriteLine(GetPercentageRounds(0.0));

        Console.WriteLine(GetPercentageRounds(0.1));

        Console.WriteLine(GetPercentageRounds(0.5));

        Console.WriteLine(GetPercentageRounds(1.0));

    }

}