using System;

public class Program

{

    public static void Main()

    {

        var hodove=double.Parse(Console.ReadLine());

        double rezult=0;

        var br09=0;

        var br1019=0;

        var br2029=0;

        var br3039=0;

        var br4050=0;

        var invalid=0;

        for(int i=1;i<=hodove;i++)

        {

        var n=int.Parse(Console.ReadLine());

            if(n>50||n<0) {invalid++; rezult/=2;}

            else

            {

                if(n<10) {br09++;rezult=rezult+0.2*n;}

                 else

                 {

                     if(n<20) {br1019++;rezult=rezult+0.3*n;}

                     else {

                         if(n<30) {br2029++; rezult=rezult+0.4*n;}

                         else {

                             if(n<40) {br3039++;rezult=rezult+50;}

                             else{br4050++;rezult=rezult+100;}

                             }

                    }

                 }

            }

        }

        Console.WriteLine("{0:f2}",rezult);

        Console.WriteLine("From 0 to 9: {0:f2}%",100*br09/hodove);

        Console.WriteLine("From 10 to 19: {0:f2}%",100*br1019/hodove);

        Console.WriteLine("From 20 to 29: {0:f2}%",100*br2029/hodove);

        Console.WriteLine("From 30 to 39: {0:f2}%",100*br3039/hodove);

        Console.WriteLine("From 40 to 50: {0:f2}%",100*br4050/hodove);

        Console.WriteLine("Invalid numbers: {0:f2}%",100*invalid/hodove);

    }

}