import java.util.Scanner;

public class Lab9_p2 {

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

        int[] random = new int[10];
        int[] number = new int[]{0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
        int[] pIN = new int[10];
        int[] password = new int[]{7, 3, 4, 6, 0};
        char[] inNumb = new char[10];
        String[] inNumb1 = new String[10];

        for (int row = 0; row < random.length; row++) {
            random[row] = (int) Math.ceil(Math.random() * 3);

        }

        for (int row = 0; row < pIN.length - 5; row++) {
            pIN[row] = (int) Math.ceil(Math.random() * 3);

        }
        System.out.print("Authentication Process\n\n");


        System.out.print("Number : ");
        for (int row = 0; row < number.length; row++) {
            System.out.printf("%2d", number[row]); // number pad row

        }

        System.out.println();
        System.out.print("Random : ");
        for (int row = 0; row < random.length; row++) {
            System.out.printf("%2d", random[row]); // random number row

        }


        //***********************************************************************
        // Gets user input(String) Converts to Char, then Char value conversion.
        System.out.println();
        System.out.println();
        System.out.print("Enter PIN sequence:");
        String user = input.next();

        for (int i = 0; i < user.length(); i++) {  //converts string into char
            inNumb[i] = user.charAt(i);

        }
        System.out.println();
        for (int i = 0; i < user.length(); i++) { //converts from Char to value of char
            inNumb1[i] = String.valueOf(inNumb[i]);

        }
//*******************************************************************************
        boolean key = false;
        for (int row = 0, match = 0; row < password.length; row++) {

            if (random[password[row]] == Integer.parseInt(inNumb1[row])) {

                match++;
                if (match == 5) {

                    key = true;
                }
            }
        }
        if (key) {
            System.out.print("Correct PIN - authentication confirmed.");
        } else {
            System.out.print("Improper PIN - authentication denied.");
        }

    }
}
// int[] password = new int []{7,3,4,6,0}; (password)