laba7_OOP

import java.io.*;
import java.util.*;

public class Main {
    public static void main(String[] args) {
        try {
            File file = new File("input.txt");
            Scanner scanner = new Scanner(file);
            List<String> surnames = new ArrayList<>();

            while (scanner.hasNextLine()) {
                String line = scanner.nextLine();
                String[] parts = line.split(" ");
                for (int i = 1; i < parts.length; i += 2) {
                    String surname = parts[i];
                    if (surname.length() > 0 && isVowel(surname.charAt(0))) {
                        surnames.add(surname);
                    }
                }
            }
            scanner.close();

            if (surnames.isEmpty()) {
                System.out.println("Нет фамилий, начинающихся на гласную букву.");
                return;
            }

            Collections.sort(surnames);
            String shortestSurname = surnames.get(0);
            for (String surname : surnames) {
                if (surname.length() < shortestSurname.length()) {
                    shortestSurname = surname;
                }
            }

            PrintWriter writer = new PrintWriter("output.txt", "UTF-8");
            writer.println(shortestSurname);
            writer.close();

            System.out.println("Самая короткая фамилия: " + shortestSurname);
        } catch (FileNotFoundException e) {
            System.out.println("Файл не найден.");
        } catch (IllegalArgumentException e) {
            System.out.println("Неверный формат данных");
        } catch (IOException e) {
            System.out.println("Ошибка записи в файл.");
        }
    }

    private static boolean isVowel(char c) {
        c = Character.toLowerCase(c);
        return c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u' || c == 'y' ||
        c == 'у' || c == 'е' || c == 'ы' || c == 'а' || c == 'о' || c == 'э' ||
        c == 'я' || c == 'и' || c == 'ю';
    }
}

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// po variantu
import java.io.*;
import java.util.*;

public class Var_work {
    public static void main(String[] args) {
        try {
            File file = new File("input2.txt");
            Scanner scanner = new Scanner(file);
            List<Integer> nums = new ArrayList<>();
            List<Integer> squares = new ArrayList<>();

            while (scanner.hasNextLine()) {
                String line = scanner.nextLine();
                String[] parts = line.split(" ");
                for (int i = 1; i < parts.length; i += 1) {
                    String num = parts[i];
                    if (Integer.parseInt(num) % 2 == 1) {
                        nums.add(Integer.parseInt(num));
                    }
                }
            }
            scanner.close();

            Integer max = Collections.max(nums);
            for (int i = 0; i*i <= max; i++) {
                squares.add(i * i);
            }

            System.out.println("квадраты нечетных чисел:");
            for (int item : nums
            ) {
                if (squares.contains(item)) {
                    System.out.println(item);
                }
            }

        } catch (FileNotFoundException e) {
            System.out.println("Файл не найден.");
        }
    }
}