package com.company;

import sun.awt.OSInfo;

import java.util.Scanner;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.FileNotFoundException;
import java.io.File;
import java.io.PrintWriter;

public class Main {
    static boolean enter(int temp, int max, int min) {
        Scanner scanner = new Scanner(System.in);
        boolean iscorrect = true;
        do {
            try {
                if ((temp > min - 1) && (temp < max + 1)) {
                    iscorrect = false;
                } else {
                    System.out.println("This is a mistake. Please enter again!");
                }
            } catch (Exception e) {
                scanner.nextLine();
                System.out.println("This is a mistake. Please enter again!");
                iscorrect = true;
            }
        }
        while (iscorrect);
        return iscorrect;
    }

    static int numb() {
        boolean invalidinput = false;
        int n = 0;
        do {
            boolean iscorrect = false;
            try {
                BufferedReader input = new BufferedReader(new FileReader("D:\\input.txt"));
                String text = input.readLine();
                do {
                    System.out.print("Enter the number of sequence members ");
                    n = Integer.parseInt(text);
                    System.out.println(n);
                    iscorrect = enter(n, 10, 1);
                } while (iscorrect);
            } catch (FileNotFoundException e) {
                System.out.println("A file with the same name was not found");
                invalidinput = true;
            } catch (IOException e) {
                System.out.println("This file cannot be opened");
                invalidinput = true;
            } catch (NumberFormatException e) {
                System.out.println("Error! File contains invalid data");
                invalidinput = true;
            }
        } while (invalidinput);
        return n;
    }

    static int[] enterarr(int numb, int n) {
        int[] arr = new int[n];
        int temp = 0;
        boolean invalidinput = false;
        do {
            boolean iscorrect = false;
            try {
                BufferedReader input = new BufferedReader(new FileReader("D:\\input.txt"));
                String text = input.readLine();
                for (int i = 0; i < numb + 1; i++) {
                    text = input.readLine();
                }
                String[] arra = text.split(" ");
                for (int i = 0; i < n; i++) {
                    do {
                        System.out.print("Enter the " + (i + 1) + " member of sequence " + (numb + 1) + " they mast not be the same ");
                        arr[i] = Integer.parseInt(arra[i]);
                        System.out.println(arr[i] + " ");
                        iscorrect = enter(arr[i], 200000, -200000);
                        for (int j = 0; j < i; j++) {
                            if (arr[j] == arr[i]) {
                                temp++;
                            }
                        }
                        if (temp > 1) {
                            iscorrect = true;
                            System.out.println("This is a mistake members are same! Please enter again!");
                        } else {
                            iscorrect = false;
                        }
                        temp = 0;
                    } while (iscorrect);
                }
                input.close();
            } catch (FileNotFoundException e) {
                System.out.println("A file with the same name was not found");
                invalidinput = true;
            } catch (IOException e) {
                System.out.println("This file cannot be opened");
                invalidinput = true;
            } catch (NumberFormatException e) {
                System.out.println("Error! File contains invalid data");
                invalidinput = true;
            }
        } while (invalidinput);
        return arr;
    }

    static void body() throws FileNotFoundException {
        boolean iscorrect = false;
        int n = numb();
        int temp = 0;
        int[] arr1 = new int[n];
        int[] arr2 = new int[n];
        arr1 = enterarr(0, n);
        arr2 = enterarr(1, n);
        File file = new File("D:\\output.txt");
        PrintWriter prwr = new PrintWriter(file);
        System.out.println("All members of sequence 2 not in sequence 1");
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < n; j++) {
                if (arr2[i] == arr1[j]) {
                    temp++;
                }
            }
            if (temp == 0) {
                prwr.print(arr2[i] + " ");
                System.out.print(arr2[i] + " ");
            }
            temp = 0;
        }
        prwr.close();
    }

    public static void main(String[] args) throws FileNotFoundException {
        System.out.println("This programm founds all members of sequence 2 not in sequence 1");
        body();
    }
}