import java.util.Scanner;

/**
 * Created by Ivan on 5/3/2017.
 */
public class MartGame {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int enters = Integer.parseInt(scanner.nextLine());

        double zeroNine = 0;
        double tenNineteen = 0;
        double twentyTwentynine = 0;
        double thertyThertynine = 0;
        double fortyFifty = 0;
        double invalidNumber = 0;
        double totalPoint = 0;


        for (int i = 0; i < enters; i++) {
          double number =   Integer.parseInt(scanner.nextLine());
          if (number >= 0 && number <=9){
            zeroNine ++;
            totalPoint += (0.2 * number);
          }
          if (number >= 10 && number <= 19){
              tenNineteen ++;
              totalPoint += (0.3 * number);
          }
          if (number >= 20 && number <= 29){
              twentyTwentynine++;
              totalPoint += (0.4 * number);
          }
          if (number >= 30 && number <=39){
              thertyThertynine ++;
              totalPoint += 50;
          }
          if (number >= 40 && number <= 50){
              fortyFifty ++;
              totalPoint += 100;
          }
          if (number < 0 || number > 50){
              invalidNumber ++;
              totalPoint = totalPoint / 2;
           }
        }
        System.out.printf("%.2f", totalPoint);
        System.out.println();
        System.out.printf("From 0 to 9: %.2f", (zeroNine * 100 / enters));
        System.out.print("%");
        System.out.println();
        System.out.printf("From 10 to 19: %.2f", (tenNineteen * 100 / enters));
        System.out.print("%");
        System.out.println();
        System.out.printf("From 20 to 29: %.2f", (twentyTwentynine * 100 / enters));
        System.out.print("%");
        System.out.println();
        System.out.printf("From 30 to 39: %.2f", (thertyThertynine * 100 / enters));
        System.out.print("%");
        System.out.println();
        System.out.printf("From 40 to 50: %.2f", (fortyFifty * 100 / enters));
        System.out.print("%");
        System.out.println();
        System.out.printf("Invalid numbers: %.2f", (invalidNumber * 100 / enters));
        System.out.print("%");
        System.out.println();
    }
}