Added a Kotlin variation.

.gitignore

@@ -1,2 +1,2 @@
-# Project exclude paths
-/out/
+Rust/lab_1/target
+Rust/lab_2/target

.idea/.gitignore

@@ -1,8 +0,0 @@
-# Default ignored files
-/shelf/
-/workspace.xml
-# Editor-based HTTP Client requests
-/httpRequests/
-# Datasource local storage ignored files
-/dataSources/
-/dataSources.local.xml

.idea/misc.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_X" default="true" project-jdk-name="openjdk-20" project-jdk-type="JavaSDK">
-    <output url="file://$PROJECT_DIR$/out" />
-  </component>
-</project>

.idea/modules.xml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectModuleManager">
-    <modules>
-      <module fileurl="file://$PROJECT_DIR$/OOP_IO-2x_2023.iml" filepath="$PROJECT_DIR$/OOP_IO-2x_2023.iml" />
-    </modules>
-  </component>
-</project>

.idea/uiDesigner.xml

@@ -1,124 +0,0 @@
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-        <initial-values>
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.idea/vcs.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$" vcs="Git" />
-  </component>
-</project>

Java/lab_1/lab_1.java

@@ -0,0 +1,31 @@
+import java.util.Scanner;
+
+public class lab_1 {
+    
+    public static int protectedInput(String variableToRead, Scanner input) {
+        do {
+            try {
+                System.out.printf("Enter %s: ", variableToRead);
+                return input.nextInt();
+            } catch (Exception e) {
+                System.out.printf("%s must be an integer.\n", variableToRead.toUpperCase());
+                input.nextLine();
+            }
+        } while (true);
+    }
+
+    public static void main(String[] args) {
+        Scanner input = new Scanner(System.in);
+
+        final int n = protectedInput("n", input);
+        final int m = protectedInput("m", input);
+        final int a = protectedInput("a", input);
+        final int b = protectedInput("b", input);
+
+        input.close();
+
+        final float s = ((float) (b + m) / 2) * (m - b + 1) * (n - a + 1);
+
+        System.out.println("S = " + s);
+    }
+}

Java/lab_1/lab_1.kt

@@ -0,0 +1,21 @@
+fun protectedInput(variableName: String): Int {
+    do {
+        try {
+            print("Enter $variableName: ")
+            return readln().toInt()
+        } catch (e: Exception) {
+            println("${variableName.uppercase()} must be an integer!")
+        }
+    } while (true)
+}
+
+fun main() {
+    val n: Int = protectedInput("n")
+    val m: Int = protectedInput("m")
+    val a: Int = protectedInput("a")
+    val b: Int = protectedInput("b")
+
+    val s: Float = (b + m).toFloat() / 2 * (m - b + 1) * (n - a + 1)
+
+    println("S = $s")
+}

Java/lab_2/lab_2.java

@@ -0,0 +1,106 @@
+import java.util.Scanner;
+
+public class lab_2 {
+
+    public static short protectedInput(String inputPrompt, String errorMessage, Scanner input) {
+        short read_variable;
+
+        do {
+            try {
+                System.out.println();
+                System.out.print(inputPrompt);
+
+                read_variable = input.nextShort();
+                break;
+            } catch (Exception e) {
+                System.out.println(errorMessage);
+                input.nextLine();
+            }
+        } while (true);
+
+        return read_variable;
+    }
+
+    public static String format(int number) {
+        int width = String.valueOf(number).length() + 1;
+        String format = "|%" + width + "d ";
+
+        return format;
+    }
+
+    public static double average(short[] row) {
+        short sum = 0;
+
+        for (short element : row) {
+            sum += element;
+        }
+
+        double result = sum / row.length;
+
+        return result;
+    }
+
+    public static void main(String[] args) {
+        short a, rows = 0, columns = 0;
+        String format;
+
+        Scanner input = new Scanner(System.in);
+
+        a = protectedInput("Input a constant to multipy a matrix by: ",
+                "A constant must be a short-data type integer, try again.", input);
+
+        System.out.println();
+        System.out.println("Input size of the matrix.");
+
+        do {
+            rows = protectedInput("Rows: ",
+                    "A number of rows must be a short-data type integer, try again.", input);
+        } while (rows <= 0);
+
+        do {
+            columns = protectedInput("Columns: ",
+                    "A number of columns must be a short-data type integer, try again.", input);
+        } while (columns <= 0);
+
+        input.close();
+
+        short[][] matrix_B = new short[rows][columns];
+
+        System.out.println();
+        System.out.println("Matrix B:");
+
+        format = format(rows * columns);
+
+        for (short i = 0; i < rows; i++) {
+            for (short j = 0; j < columns; j++) {
+                matrix_B[i][j] = (short) ((i + 1) * (j + 1));
+
+                System.out.printf(format, matrix_B[i][j]);
+            }
+
+            System.out.println("|");
+        }
+
+        System.out.println();
+        System.out.println("Matrix a×B:");
+
+        format = format(rows * columns * a);
+
+        for (short i = 0; i < matrix_B.length; i++) {
+            for (short j = 0; j < matrix_B[i].length; j++) {
+                matrix_B[i][j] *= (short) (a);
+
+                System.out.printf(format, matrix_B[i][j]);
+            }
+
+            System.out.println("|");
+        }
+
+        System.out.println();
+        System.out.println("Averages of each row:");
+
+        for (short[] row : matrix_B) {
+            System.out.println(average(row));
+        }
+    }
+}

Java/lab_3/lab_3.java

@@ -0,0 +1,58 @@
+package OOP.Java.lab_3;
+
+public class lab_3 {
+    static int maxStrLength;
+    static String result;
+    
+    public static void cSubUtil(StringBuilder stringbuilder, int leftBoundary, int rightBoundary) {
+        String string = stringbuilder.toString().toLowerCase().replaceAll("[^a-z]","");
+        // check if the indices lie in the range of string
+        // and also if it is palindrome
+        while (leftBoundary >= 0 && rightBoundary < string.length() && string.toLowerCase().charAt(leftBoundary) == string.toLowerCase().charAt(rightBoundary)) {
+            // expand the boundary
+            leftBoundary--;
+            rightBoundary++;
+        }
+        // if it's length is greater than maxLength update
+        // maxLength and res
+        if (rightBoundary - leftBoundary - 1 >= maxStrLength) {
+            result = string.substring(leftBoundary + 1, rightBoundary);
+            maxStrLength = rightBoundary - leftBoundary - 1;
+        }
+        return;
+    }
+
+    public static int longestPalSubstr(StringBuilder string)
+    {
+        result = "";
+        maxStrLength = 1;
+        // for every index in the string check palindromes
+        // starting from that index
+        for (int i = 0; i < string.length(); i++) {
+            // check for odd length palindromes
+            cSubUtil(string, i, i);
+            // check for even length palindromes
+            cSubUtil(string, i, i + 1);
+        }
+        System.out.println("Longest palindrome substring is: " + compareStrings(string));
+        return compareStrings(string).length();
+    }
+
+    public static String compareStrings(StringBuilder builder) {
+        for (int leftBoundary = 0; leftBoundary <= builder.length(); leftBoundary++) {
+            for (int rightBoundary = builder.length(); leftBoundary >= 0; rightBoundary--) {
+                if (result.equals(builder.substring(leftBoundary, rightBoundary).toString().toLowerCase().replaceAll("[^a-z]",""))) {
+                    return builder.substring(leftBoundary, rightBoundary).toString();
+                }
+            }
+        }
+        return "";
+    }
+
+    public static void main(String[] args) {
+        StringBuilder stringToDetect = new StringBuilder("Eva, can I see bees in a cave?");
+
+        System.out.println("Initial string: " + stringToDetect.toString());
+        System.out.println("Length is: " + longestPalSubstr(stringToDetect));
+    }
+}

OOP_IO-2x_2023.iml

@@ -1,11 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="JAVA_MODULE" version="4">
-  <component name="NewModuleRootManager" inherit-compiler-output="true">
-    <exclude-output />
-    <content url="file://$MODULE_DIR$">
-      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
-    </content>
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
-</module>

Rust/lab_1/Cargo.lock

@@ -0,0 +1,16 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "lab_1"
+version = "0.1.0"
+dependencies = [
+ "text_io",
+]
+
+[[package]]
+name = "text_io"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d5f0c8eb2ad70c12a6a69508f499b3051c924f4b1cfeae85bfad96e6bc5bba46"

Rust/lab_1/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "lab_1"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[profile.release]
+opt-level = 'z'     # Optimize for size
+lto = true          # Enable link-time optimization
+codegen-units = 1   # Reduce number of codegen units to increase optimizations
+panic = 'abort'     # Abort on panic
+strip = true        # Strip symbols from binary*
+
+[dependencies]
+text_io = "0.1.12"

Rust/lab_1/src/main.rs

@@ -0,0 +1,22 @@
+fn protected_read(variable_name: &str) -> i32 {
+    use text_io::try_read;
+    loop {
+        print!("Enter {}: ", variable_name);
+        let read_result: Result<i32, _> = try_read!();
+        match read_result {
+            Ok(read_integer) => return read_integer,
+            Err(_e) => println!("{} must be an integer!", variable_name.to_uppercase()),
+        }
+    }
+}
+
+fn main() {
+    let n: i32 = protected_read("n");
+    let m: i32 = protected_read("m");
+    let a: i32 = protected_read("a");
+    let b: i32 = protected_read("b");
+
+    let s: f32 = ((b + m) as f32 / 2f32) * ((m - b + 1) * (n - a + 1)) as f32;
+
+    println!("S = {}", s);
+}

Rust/lab_2/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "lab_2"
+version = "0.1.0"

Rust/lab_2/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "lab_2"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

Rust/lab_2/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

lab2.iml

@@ -1,11 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="JAVA_MODULE" version="4">
-  <component name="NewModuleRootManager" inherit-compiler-output="true">
-    <exclude-output />
-    <content url="file://$MODULE_DIR$">
-      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
-    </content>
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
-</module>

src/Lab5.java

@@ -1,231 +0,0 @@
-import java.util.ArrayList;
-import java.util.List;
-
-class Letter {
-    private char character;
-
-    public Letter(char character) {
-        this.character = character;
-    }
-
-    public char getCharacter() {
-        return character;
-    }
-
-    @Override
-    public String toString() {
-        return String.valueOf(character);
-    }
-}
-
-class Word {
-    private List<Letter> letters;
-
-    public Word(List<Letter> letters) {
-        this.letters = letters;
-    }
-
-    public List<Letter> getLetters() {
-        return letters;
-    }
-
-    @Override
-    public String toString() {
-        StringBuilder wordBuilder = new StringBuilder();
-        for (Letter letter : letters) {
-            wordBuilder.append(letter.getCharacter());
-        }
-        return wordBuilder.toString();
-    }
-}
-
-class Sentence {
-    private List<Object> components;
-
-    public Sentence(List<Object> components) {
-        this.components = components;
-    }
-
-    public List<Object> getComponents() {
-        return components;
-    }
-
-    @Override
-    public String toString() {
-        StringBuilder sentenceBuilder = new StringBuilder();
-        for (Object component : components) {
-            if (component instanceof Word) {
-                List<Letter> letters = ((Word) component).getLetters();
-                for (Letter letter : letters) {
-                    sentenceBuilder.append(letter.getCharacter());
-                }
-            } else if (component instanceof PunctuationMark) {
-                sentenceBuilder.append(((PunctuationMark) component).getMark());
-            }
-            sentenceBuilder.append(" ");
-        }
-        return sentenceBuilder.toString().trim();
-    }
-}
-
-class PunctuationMark {
-    private char mark;
-
-    public PunctuationMark(char mark) {
-        this.mark = mark;
-    }
-
-    public char getMark() {
-        return mark;
-    }
-
-    @Override
-    public String toString() {
-        return String.valueOf(mark);
-    }
-}
-
-class Text {
-    private List<Sentence> sentences;
-
-    public Text(List<Sentence> sentences) {
-        this.sentences = sentences;
-    }
-
-    public List<Sentence> getSentences() {
-        return sentences;
-    }
-
-    @Override
-    public String toString() {
-        StringBuilder textBuilder = new StringBuilder();
-        for (Sentence sentence : sentences) {
-            textBuilder.append(sentence.toString()).append(". ");
-        }
-        return textBuilder.toString().trim();
-    }
-}
-
-public class Lab5 {
-    public static void main(String[] args) {
-        System.out.println("C17 = " + 2425%17);
-        StringBuffer sentence = new StringBuffer("об'єктно-орієнтована мова програмування , випущена 1995 року компанією" +
-                " Сан Майкросістемс , як основний компонент платформи Джава." +
-                " З 2009 року мовою займається компанія Оракл , яка того року придбала Сан Майкросістемс. В офіційній" +
-                " реалізації Джава-програми компілюються у байт-код , який при виконанні інтерпретується віртуальною" +
-                " машиною для конкретної платформи");
-
-        // Заміна послідовності табуляцій та пробілів одним пробілом
-        String cleanedText = replaceTabsAndSpaces(sentence.toString());
-
-        // Розбиття тексту на речення
-        String[] sentenceArray = cleanedText.split("\\.");
-
-        List<Sentence> sentences = new ArrayList<>();
-        List<Character> punctuationMarks = new ArrayList<>();
-
-        for (String s : sentenceArray) {
-            // Розбиття речення на слова та розділові знаки
-            String[] components = s.trim().split("\\s+");
-
-            List<Object> sentenceComponents = new ArrayList<>();
-
-            for (String component : components) {
-                if (isPunctuationMark(component)) {
-                    // Додавання розділових знаків
-                    char mark = component.charAt(component.length() - 1);
-                    punctuationMarks.add(mark);
-                    sentenceComponents.add(new PunctuationMark(mark));
-                } else {
-                    // Створення слова
-                    List<Letter> letters = new ArrayList<>();
-                    for (char c : component.toCharArray()) {
-                        letters.add(new Letter(c));
-                    }
-                    sentenceComponents.add(new Word(letters));
-                }
-            }
-
-            sentences.add(new Sentence(sentenceComponents));
-        }
-
-        // Створення тексту
-        Text text = new Text(sentences);
-
-        // Виведення букв, слів та речень
-        List<Sentence> allSentences = text.getSentences();
-        for (Sentence s : allSentences) {
-            List<Object> components = s.getComponents();
-
-            for (Object component : components) {
-                if (component instanceof Word) {
-                    System.out.println("Слово: " + component);
-                    List<Letter> letters = ((Word) component).getLetters();
-                    for (Letter letter : letters) {
-                        System.out.println("Літера: " + letter.getCharacter());
-                    }
-                } else if (component instanceof PunctuationMark) {
-                    System.out.println("Розділовий знак: " + ((PunctuationMark) component).getMark());
-                }
-            }
-
-            System.out.println("Речення: " + s.toString());
-            System.out.println();
-        }
-
-        // Виведення розділових знаків
-        System.out.println("Розділові знаки:");
-        for (Character mark : punctuationMarks) {
-            System.out.println(mark);
-        }
-
-        // Виведення масиву речень з пробілами
-        System.out.println("Масив речень:");
-        for (Sentence s : allSentences) {
-            System.out.println(s.toString());
-        }
-
-        // Видалення слів заданої довжини, починаючи з приголосної літери
-        removeWords(allSentences);
-
-        // Виведення оновленого тексту
-        System.out.println("Оновлений текст:");
-        System.out.println(text.toString());
-
-    }
-
-
-    // Функція для заміни табуляцій та пробілів одним пробілом
-    private static String replaceTabsAndSpaces(String text) {
-        return text.replaceAll("\\s+", " ");
-    }
-
-    // Функція для перевірки, чи є рядок розділовим знаком
-    private static boolean isPunctuationMark(String text) {
-        return text.matches(".*[,.]$");
-    }
-
-    // Функція для видалення слів заданої довжини, починаючи з приголосної літери
-    private static void removeWords(List<Sentence> sentences) {
-        String consonants = "бвгґджзклмнпрстфхцчшщ";
-        for (Sentence sentence : sentences) {
-            List<Object> components = sentence.getComponents();
-            List<Object> componentsToRemove = new ArrayList<>();
-
-            for (Object component : components) {
-                if (component instanceof Word) {
-                    Word word = (Word) component;
-                    List<Letter> letters = word.getLetters();
-                    int wordLength = letters.size();
-                    char firstLetter = letters.get(0).getCharacter();
-
-                    if ((wordLength > 5) && (wordLength < 9) && consonants.contains(String.valueOf(firstLetter))) {
-                        componentsToRemove.add(component);
-                    }
-                }
-            }
-
-            components.removeAll(componentsToRemove);
-        }
-    }
-}

src/Lab6.java

@@ -1,117 +0,0 @@
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.Comparator;
-import java.util.List;
-import java.util.Scanner;
-
-class Train {
-    private List<PassengerCarriage> carriages;
-
-    public Train(List<PassengerCarriage> carriages) {
-        this.carriages = carriages;
-    }
-
-    public int getTotalPassengerCount() {
-        int totalPassengerCount = 0;
-        for (PassengerCarriage carriage : carriages) {
-            totalPassengerCount += carriage.getPassengerCount();
-        }
-        return totalPassengerCount;
-    }
-
-    public int getTotalLuggageCount() {
-        int totalLuggageCount = 0;
-        for (PassengerCarriage carriage : carriages) {
-            totalLuggageCount += carriage.getLuggageCount();
-        }
-        return totalLuggageCount;
-    }
-
-    public void sortCarriagesByComfortLevel() {
-        Collections.sort(carriages, new Comparator<PassengerCarriage>() {
-            @Override
-            public int compare(PassengerCarriage c1, PassengerCarriage c2) {
-                return c1.getComfortLevel() - c2.getComfortLevel();
-            }
-        });
-    }
-
-    public PassengerCarriage findCarriageByPassengerCount(int minPassengers, int maxPassengers) {
-        for (PassengerCarriage carriage : carriages) {
-            int passengerCount = carriage.getPassengerCount();
-            if (passengerCount >= minPassengers && passengerCount <= maxPassengers) {
-                return carriage;
-            }
-        }
-        return null;
-    }
-}
-
-class PassengerCarriage {
-    private int passengerCount;
-    private int luggageCount;
-    private int comfortLevel;
-
-    public PassengerCarriage(int passengerCount, int luggageCount, int comfortLevel) {
-        this.passengerCount = passengerCount;
-        this.luggageCount = luggageCount;
-        this.comfortLevel = comfortLevel;
-    }
-
-    public int getPassengerCount() {
-        return passengerCount;
-    }
-
-    public int getLuggageCount() {
-        return luggageCount;
-    }
-
-    public int getComfortLevel() {
-        return comfortLevel;
-    }
-}
-
-public class Lab6 {
-    public static void main(String[] args) {
-        // Задаємо характеристики вагонів
-        List<PassengerCarriage> carriages = new ArrayList<>();
-        carriages.add(new PassengerCarriage(30, 64, 3));
-        carriages.add(new PassengerCarriage(53, 126, 2));
-        carriages.add(new PassengerCarriage(89, 164, 1));
-
-        Train train = new Train(carriages);
-
-        int totalPassengerCount = train.getTotalPassengerCount();
-        int totalLuggageCount = train.getTotalLuggageCount();
-
-        System.out.println("Кількість всіх пасажирів: " + totalPassengerCount);
-        System.out.println("Кількість всього багажу: " + totalLuggageCount);
-
-        train.sortCarriagesByComfortLevel();
-
-        System.out.println("Вагони відсортовані за рівнем комфорту:");
-        for (PassengerCarriage carriage : carriages) {
-            System.out.println("Кількість пасажирів: " + carriage.getPassengerCount() +
-                    ", Рівень комфорту: " + carriage.getComfortLevel());
-        }
-
-        Scanner scanner = new Scanner(System.in);
-
-        System.out.print("Введіть мінімальну кількість пасажирів: ");
-        int minPassengers = scanner.nextInt();
-        System.out.print("Введіть максимальну кількість пасажирів: ");
-        int maxPassengers = scanner.nextInt();
-
-        PassengerCarriage carriage = train.findCarriageByPassengerCount(minPassengers, maxPassengers);
-
-        if (carriage != null) {
-            System.out.println("Вагон знайдений за кількість пасажирів між " +
-                    minPassengers + " та " + maxPassengers);
-            System.out.println("Кількість пасажирів: " + carriage.getPassengerCount() +
-                    ", Рівень комфорту: " + carriage.getComfortLevel());
-        } else {
-            System.out.println("Вагон не знайдений за кількістю пасажирів " +
-                    minPassengers + " між " + maxPassengers);
-        }
-    }
-}