diff --git a/Dart/primalityTest.dart b/Dart/primalityTest.dart
index 047b550..3fd25cf 100644
--- a/Dart/primalityTest.dart
+++ b/Dart/primalityTest.dart
@@ -32,9 +32,9 @@ bool Prime(int x) {
 }
 
 void main() {
-  var rng = new Random();
+  Random random = new Random();
   for (int i = 0; i < 10; i++) {
-    int x = rng.nextInt(100);
+    int x = random.nextInt(100);
     print("$x ${Prime(x)}");
   }
   Eratostene(100);
diff --git a/Java/.devcontainer/devcontainer.json b/Java/.devcontainer/devcontainer.json
new file mode 100644
index 0000000..6cdc7d7
--- /dev/null
+++ b/Java/.devcontainer/devcontainer.json
@@ -0,0 +1,27 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/java
+{
+	"name": "Java",
+	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+	"image": "mcr.microsoft.com/devcontainers/java:0-17",
+
+	"features": {
+		"ghcr.io/devcontainers/features/java:1": {
+			"version": "none",
+			"installMaven": "true",
+			"installGradle": "false"
+		}
+	}
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "java -version",
+
+	// Configure tool-specific properties.
+	// "customizations": {},
+
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+}
diff --git a/Java/observable/pom.xml b/Java/observable/pom.xml
new file mode 100644
index 0000000..86d729d
--- /dev/null
+++ b/Java/observable/pom.xml
@@ -0,0 +1,75 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>com.test</groupId>
+  <artifactId>observable</artifactId>
+  <version>1.0-SNAPSHOT</version>
+
+  <name>observable</name>
+  <!-- FIXME change it to the project's website -->
+  <url>http://www.example.com</url>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <maven.compiler.source>1.7</maven.compiler.source>
+    <maven.compiler.target>1.7</maven.compiler.target>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>4.13.1</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
+      <plugins>
+        <!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
+        <plugin>
+          <artifactId>maven-clean-plugin</artifactId>
+          <version>3.1.0</version>
+        </plugin>
+        <!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
+        <plugin>
+          <artifactId>maven-resources-plugin</artifactId>
+          <version>3.0.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-compiler-plugin</artifactId>
+          <version>3.8.0</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-surefire-plugin</artifactId>
+          <version>2.22.1</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-jar-plugin</artifactId>
+          <version>3.0.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-install-plugin</artifactId>
+          <version>2.5.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-deploy-plugin</artifactId>
+          <version>2.8.2</version>
+        </plugin>
+        <!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
+        <plugin>
+          <artifactId>maven-site-plugin</artifactId>
+          <version>3.7.1</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-project-info-reports-plugin</artifactId>
+          <version>3.0.0</version>
+        </plugin>
+      </plugins>
+    </pluginManagement>
+  </build>
+</project>
diff --git a/Java/observable/src/main/java/com/test/App.java b/Java/observable/src/main/java/com/test/App.java
new file mode 100644
index 0000000..5808c6c
--- /dev/null
+++ b/Java/observable/src/main/java/com/test/App.java
@@ -0,0 +1,14 @@
+package com.test;
+
+/**
+ * Hello world!
+ *
+ */
+public class App {
+    public static void main(String[] args) {
+        Message message = new Message();
+        DataSender ds = new DataSender("reader 1");
+        message.register(ds);
+        message.readMessage("pollo");
+    }
+}
diff --git a/Java/observable/src/main/java/com/test/DataSender.java b/Java/observable/src/main/java/com/test/DataSender.java
new file mode 100644
index 0000000..0a883e5
--- /dev/null
+++ b/Java/observable/src/main/java/com/test/DataSender.java
@@ -0,0 +1,17 @@
+package com.test;
+
+public class DataSender implements Observer {
+
+    private final String name;
+
+    DataSender(String readerName) {
+        name = readerName;
+    }
+
+    @Override
+    public void update(String data) {
+        /* trigger update */
+        System.out.println(String.format("Received message %s", data));
+    }
+
+}
diff --git a/Java/observable/src/main/java/com/test/Message.java b/Java/observable/src/main/java/com/test/Message.java
new file mode 100644
index 0000000..d35d879
--- /dev/null
+++ b/Java/observable/src/main/java/com/test/Message.java
@@ -0,0 +1,34 @@
+package com.test;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Message implements Subject {
+
+    private List<Observer> observers = new ArrayList<>();
+
+    private String value = "value";
+
+    public void readMessage(String value) {
+        /* lettura messaggio */
+        this.value = value;
+        notifyObservers();
+    }
+
+    @Override
+    public void register(Observer observer) {
+        observers.add(observer);
+    }
+
+    @Override
+    public void unregister(Observer observer) {
+        observers.remove(observer);
+    }
+
+    @Override
+    public void notifyObservers() {
+        for (Observer observer : observers) {
+            observer.update(this.value);
+        }
+    }
+}
diff --git a/Java/observable/src/main/java/com/test/Observer.java b/Java/observable/src/main/java/com/test/Observer.java
new file mode 100644
index 0000000..6814df2
--- /dev/null
+++ b/Java/observable/src/main/java/com/test/Observer.java
@@ -0,0 +1,5 @@
+package com.test;
+
+public interface Observer {
+    public void update(String data);
+}
diff --git a/Java/observable/src/main/java/com/test/Subject.java b/Java/observable/src/main/java/com/test/Subject.java
new file mode 100644
index 0000000..a67d6e0
--- /dev/null
+++ b/Java/observable/src/main/java/com/test/Subject.java
@@ -0,0 +1,9 @@
+package com.test;
+
+public interface Subject {
+    public void register(Observer observer);
+
+    public void unregister(Observer observer);
+
+    public void notifyObservers();
+}
diff --git a/Java/observable/src/test/java/com/test/AppTest.java b/Java/observable/src/test/java/com/test/AppTest.java
new file mode 100644
index 0000000..e678d6b
--- /dev/null
+++ b/Java/observable/src/test/java/com/test/AppTest.java
@@ -0,0 +1,20 @@
+package com.test;
+
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+/**
+ * Unit test for simple App.
+ */
+public class AppTest 
+{
+    /**
+     * Rigorous Test :-)
+     */
+    @Test
+    public void shouldAnswerWithTrue()
+    {
+        assertTrue( true );
+    }
+}
diff --git a/Java/observable/target/classes/com/test/App.class b/Java/observable/target/classes/com/test/App.class
new file mode 100644
index 0000000..048990a
Binary files /dev/null and b/Java/observable/target/classes/com/test/App.class differ
diff --git a/Java/observable/target/classes/com/test/DataSender.class b/Java/observable/target/classes/com/test/DataSender.class
new file mode 100644
index 0000000..e15368f
Binary files /dev/null and b/Java/observable/target/classes/com/test/DataSender.class differ
diff --git a/Java/observable/target/classes/com/test/Message.class b/Java/observable/target/classes/com/test/Message.class
new file mode 100644
index 0000000..6cffcf0
Binary files /dev/null and b/Java/observable/target/classes/com/test/Message.class differ
diff --git a/Java/observable/target/classes/com/test/Observer.class b/Java/observable/target/classes/com/test/Observer.class
new file mode 100644
index 0000000..c0d6f88
Binary files /dev/null and b/Java/observable/target/classes/com/test/Observer.class differ
diff --git a/Java/observable/target/classes/com/test/Subject.class b/Java/observable/target/classes/com/test/Subject.class
new file mode 100644
index 0000000..355ec57
Binary files /dev/null and b/Java/observable/target/classes/com/test/Subject.class differ
diff --git a/Java/observable/target/test-classes/com/test/AppTest.class b/Java/observable/target/test-classes/com/test/AppTest.class
new file mode 100644
index 0000000..1b69bad
Binary files /dev/null and b/Java/observable/target/test-classes/com/test/AppTest.class differ
diff --git a/Rust/src/main.rs b/Rust/src/main.rs
index b65d48a..1839107 100644
--- a/Rust/src/main.rs
+++ b/Rust/src/main.rs
@@ -1,5 +1,18 @@
 use std::collections::HashMap;
 
+#[derive(PartialEq, Eq, Clone, Debug)]
+pub struct ListNode {
+    pub val: i32,
+    pub next: Option<Box<ListNode>>,
+}
+
+impl ListNode {
+    #[inline]
+    fn new(val: i32) -> Self {
+        ListNode { next: None, val }
+    }
+}
+
 fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
     for (index_one, &num_one) in nums.iter().enumerate() {
         for (index_two, &num_two) in nums.iter().enumerate() {
@@ -37,6 +50,34 @@ fn two_sum_hash_map(nums: Vec<i32>, target: i32) -> Vec<i32> {
     return vec![0, 0];
 }
 
+fn is_palindrome(x: i32) -> bool {
+    if x > 0 || (x % 100 == 0 && x == 0) {
+        let stringed: String = x.to_string();
+        let reverted: String = stringed.chars().rev().collect::<String>();
+        return stringed == reverted;
+    }
+    return false;
+}
+
+fn merge_two_lists(
+    list1: Option<Box<ListNode>>,
+    list2: Option<Box<ListNode>>,
+) -> Option<Box<ListNode>> {
+    if list1.is_none() {
+        return list1;
+    }
+    if list2.is_none() {
+        return list2;
+    }
+    if list1.unwrap().val <= list2.unwrap().val {
+        list1.unwrap().next = merge_two_lists(list1.unwrap().next, list2);
+        return list1.clone();
+    } else {
+        list2.unwrap().next = merge_two_lists(list1, list2.unwrap().next);
+        return list2.clone();
+    }
+}
+
 fn main() -> () {
     let numbers: Vec<i32> = (1..101).collect();
     let result: i32 = 58;
@@ -46,4 +87,15 @@ fn main() -> () {
         "Solution: {:?}\n",
         two_sum_hash_map(numbers.clone(), result)
     );
+
+    let palindrome_number: i32 = 121;
+    println!(
+        "{:?} {} palindrome",
+        palindrome_number,
+        if is_palindrome(palindrome_number) {
+            "is"
+        } else {
+            "ís not"
+        }
+    );
 }
diff --git a/python/reservation.py b/python/reservation.py
new file mode 100644
index 0000000..0cb3124
--- /dev/null
+++ b/python/reservation.py
@@ -0,0 +1,49 @@
+from selenium import webdriver
+from selenium.webdriver.common.keys import Keys
+import time
+
+print("Running script, wait...")
+time_complexity=6
+time_complexity -= 2
+richWellControl=1
+time.sleep(time_complexity)
+
+if(richWellControl==1):
+    print("RichWell protection find. Trying to bypass it...")
+    time.sleep(5)
+    for i in range(50):
+        if(i%10==0):
+            time.sleep(2)
+            print("Trying force...")
+            time.sleep(1)
+        else:
+            time.sleep
+            print("xfca skip...")
+    richWellControl=0
+    print("RichWell protection bypassed")
+    time.sleep(2)
+    print("Establishing connection on smart_edu site...")
+    time.sleep(4)
+
+cookie="4369206861692070726f7661746f2c206b696e67"
+
+driver = webdriver.Firefox()
+driver.set_window_position(0, 0)
+driver.set_window_size(1024, 768)
+
+driver.get("https://www.google.it")
+driver.find_element_by_id('L2AGLb').click()
+driver.find_element_by_name('q').send_keys('smart_edu unict')
+driver.find_element_by_name('q').send_keys(Keys.ENTER)
+driver.get("https://studenti.smartedu.unict.it/")
+
+johnson_url = "68747470733a2f2f7777772e796f75747562652e636f6d2f77617463683f763d6451773477395767586351"
+
+driver.get(bytes.fromhex(johnson_url).decode('utf-8'))
+time.sleep(1)
+driver.find_element_by_xpath("/html/body/ytd-app/ytd-consent-bump-v2-lightbox/tp-yt-paper-dialog/div[4]/div[2]/div[5]/div[2]/ytd-button-renderer[2]/a").click()
+
+if(cookie):
+    print("Cookie session obtained: " + cookie)
+else:
+    print("Unable to obtaining cookie session")