public class Main {
    public static void main(String[] args) {
        short a = 10;
        short b = 20;
        short c = a + b;
        System.out.println(c);
    }
}

public class Task210525 {
    public static void main(String[] args) {
        String s1 = new String("Java");
        String s2 = s1.intern();
        String s3 = "Java";
        
        System.out.println(s1 == s2);
        System.out.println(s2 == s3);
    }
}

public class Task220525 {
    public static void main(String[] args) {
        long a = 1_000_000_000 * 3_000;
        long b = 1_000_000_000L * 3_000;
        System.out.println(a == b);
    }
}

public class Task230525 {
    public static void main(String[] args) {
        String str = "  Hello  ";
        str = str.trim().replace('H', 'J').substring(1, 4);
        System.out.println(str);
    }
}

public class Task260525 {
    public static void main(String[] args) {
        double d1 = 0.1 + 0.2;
        double d2 = 0.3;
        System.out.println(d1 == d2);
    }
}

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

public class Task270525 {
    public static void main(String[] args) {
        try (Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/test", "user", "pass");
             Statement stmt = conn.createStatement()) {
            
            conn.setAutoCommit(false);
            stmt.executeUpdate("INSERT INTO users VALUES (1, 'John')");
            stmt.executeUpdate("INSERT INTO users VALUES (1, 'Mike')");
            conn.commit();
            
        } catch (
                SQLException e) {
            System.out.println("Error occurred");
        }
    }
}

public class Task280525 {
    public static void main(String[] args) {
        float f = 16777216f;
        System.out.println(f == (f + 1f));
    }
}

public class Task290525 {
    public static void main(String[] args) {
        System.out.println(1.0 / 0.0);
    }
}

public class Task300525 {
    public static void main(String[] args) {
        char c = 'A';
        c += 1.5;
        System.out.println(c);
    }
}