public class Task080925 {
    public static void main(String[] args) {
        Long a = 100L;
        Long b = 100L;
        Long c = 200L;
        Long d = 200L;
        
        System.out.println((a == b) + " " + (c == d));
    }
}

interface Calculator090925 {
    static int multiply(int a, int b) {
        return a * b;
    }
    
    default int add(int a, int b) {
        return a + b;
    }
}

class Math090925 implements Calculator090925 {}

public class Task090925 {
    public static void main(String[] args) {
        Math090925 math = new Math090925();
        System.out.println(math.add(2, 3));
        System.out.println(Math.multiply(2, 3));
    }
}

public class Task100925 {
    public static void main(String[] args) {
        int[] a = {1, 2, 3};
        int[] b = a;
        b[0] = 10;
        System.out.println(a[0]);
    }
}

public class Task110925 {
    public static void main(String[] args) {
        final int x = 10;
        final int y = getValue();
        
        System.out.println(x + y);
    }
    
    static int getValue() {
        return 20;
    }
}

public class Task120925 {
    public static void main(String[] args) {
        double a = 0.1;
        double b = 0.2;
        double c = 0.3;
        
        System.out.println(a + b == c);
    }
}

public class Task150925 {
    static int x = 5;
    
    static {
        x = 10;
        y = 20;
    }
    
    static int y = 15;
    
    public static void main(String[] args) {
        System.out.println(x + " " + y);
    }
}

import java.util.concurrent.*;

public class Task160925 {
    public static void main(String[] args) throws Exception {
        ExecutorService executor = Executors.newSingleThreadExecutor();
        Future<String> future = executor.submit(() -> {
            Thread.sleep(1000);
            return "Done";
        });
        
        System.out.println(future.get(500, TimeUnit.MILLISECONDS));
        executor.shutdown();
    }
}

enum Status {
    ACTIVE, INACTIVE;
    
    Status() {
        System.out.print(this.name() + " ");
    }
}

public class Task170925 {
    public static void main(String[] args) {
        System.out.print("Start ");
        Status status = Status.ACTIVE;
        System.out.print("End");
    }
}

import java.util.HashSet;
import java.util.Set;

public class Task180925 {
    public static void main(String[] args) {
        Point p1 = new Point(1, 2);
        Point p2 = new Point(1, 3);
        Set<Point> set = new HashSet<>();
        set.add(p1);
        set.add(p2);
        System.out.println(set.size());
    }

    public record Point(int x, int y) {
        public Point {
            if (x < 0) throw new IllegalArgumentException("x < 0");
            if (y < 0) throw new IllegalArgumentException("y < 0");
        }

        public boolean equals(Object o) {
            return o instanceof Point p && p.x == x;
        }

        public int hashCode() {
            return x;
        }
    }
}

class Animal190925 {
    public String speak() {
        return "Some sound";
    }
}

class Dog190925 extends Animal190925 {
    public String speak() {
        return "Woof";
    }
    
    public String fetch() {
        return "Fetching stick";
    }
}

public class Task190925 {
    public static void main(String[] args) {
        Animal190925 myAnimal = new Dog190925();
        System.out.println(myAnimal.speak());
        System.out.println(myAnimal.fetch());
    }
}