Game of Intervals - Java Basics Exam 18 March 2017

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        int gameMoves = Integer.parseInt(input.nextLine());

        double from0to9 = 0;
        double from10to19 = 0;
        double from20to29 = 0;
        double from30to39 = 0;
        double from40to50 = 0;
        double invalidNumbers = 0;
        double totalResult = 0;

        for (int i = 0; i < gameMoves; i++) {

            int checkNumber = Integer.parseInt(input.nextLine());

            if (checkNumber >= 0 && checkNumber <= 9) {
                from0to9++;
                totalResult += checkNumber * 0.2;
            } else if (checkNumber >= 10 && checkNumber <= 19) {
                from10to19++;
                totalResult += checkNumber * 0.3;
            } else if (checkNumber >= 20 && checkNumber <= 29) {
                from20to29++;
                totalResult += checkNumber * 0.4;
            } else if (checkNumber >= 30 && checkNumber <= 39) {
                from30to39++;
                totalResult += 50;
            } else if (checkNumber >= 40 && checkNumber <= 50) {
                from40to50++;
                totalResult += 100;
            } else {
                totalResult /= 2;
                invalidNumbers++;
            }
        }
        System.out.printf("%.2f%n", totalResult);
        System.out.printf("From 0 to 9: %.2f%%%n", from0to9 / gameMoves * 100);
        System.out.printf("From 10 to 19: %.2f%%%n",from10to19 / gameMoves * 100);
        System.out.printf("From 20 to 29: %.2f%%%n",from20to29 / gameMoves * 100);
        System.out.printf("From 30 to 39: %.2f%%%n",from30to39 / gameMoves * 100);
        System.out.printf("From 40 to 50: %.2f%%%n",from40to50 / gameMoves * 100);
        System.out.printf("Invalid numbers: %.2f%%%n",invalidNumbers / gameMoves * 100);
    }
}