import java.util.Scanner;
public class Lab10_Ex2
    {
    public static void main(String[] args)
        {
        Scanner keyboard = new Scanner(System.in);
        int [] occurences = getOccurencesofNumbers(keyboard);
        printOccurences(occurences);

        }
    public static int [] getOccurencesofNumbers(Scanner keyboard)
        {
        int number;
        boolean validity =true;
        int [] counter = new int [10];
        do
            {
            System.out.print("\nEnter a one-digit number or 999 to exit: ");
            number = keyboard.nextInt();
               if(number==0)
                counter[0]++;
                else if(number==1)
                counter[1]++;
                else if(number==2)
                counter[2]++;
                else if(number==3)
                counter[3]++;
                else if(number==4)
                counter[4]++;
                else if(number==5)
                counter[5]++;
                else if(number==6)
                counter[6]++;
                else if(number==7)
                counter[7]++;
                else if(number==8)
                counter[8]++;
                else if(number==9)
                counter[9]++;
                else if(number==999)
                validity = false;
                else
                System.out.print("\n\n Error! incorrect input entered.\n");
            }
        while(validity);
        return counter;
        }

    public static void printOccurences( int [] occurences)
        {
        for( int x=0; x<10; x++)
            {
            if(occurences[x]!=0)
            System.out.println("\n You entered "+ occurences[x] + ", " + x + "(s)");
            }

        }


    }