import java.util.Scanner;

public class GameOfIntervals {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        int numbersMove = Integer.parseInt(scan.nextLine());
        double result = 0.0;
        double points = 0.0;

        double firstCounter = 0.0;
        double secondCounter = 0.0;
        double thirdCounter = 0.0;
        double fourthCounter = 0.0;
        double fifthCounter = 0.0;
        double sixthCounter = 0.0;

        for (int i = 0; i < numbersMove; i++) {
            int numberTimes = Integer.parseInt(scan.nextLine());
            points = 0;


            if ( numberTimes <0 || numberTimes >50){
                 result/=2;
                 sixthCounter++;

            }else if (numberTimes <=9){
                result = 0.2 * numberTimes;
                fifthCounter++;

            }else if (numberTimes <= 19){
                result = 0.30 * numberTimes;
                secondCounter++;

            }else if (numberTimes <=29){
                result = 0.40 * numberTimes;
                thirdCounter++;

            }else if (numberTimes <= 39){
                result+=50;
                fourthCounter++;

            }else {
                result+=100;
                fifthCounter++;
            }


        }
        System.out.printf("%.2f", result);
        System.out.printf("From 0 to 9: %.2f%%", firstCounter /(numbersMove*100));
        System.out.printf("From 10 to 19: %.2f%%", secondCounter /(numbersMove*100));
        System.out.printf("From 20 to 29: %.2f%%", thirdCounter /(numbersMove*100));
        System.out.printf("From 30 to 39: %.2f%%", fourthCounter /(numbersMove*100));
        System.out.printf("From 40 to 50: %.2f%%", fifthCounter /(numbersMove*100));
        System.out.printf("Invalid number: %.2f%%", sixthCounter /(numbersMove*100));


    }
}