diff --git a/Answers/Yas Hassanpour_ 40231712003/.gitignore b/Answers/Yas Hassanpour_ 40231712003/.gitignore
new file mode 100644
index 0000000..5ff6309
--- /dev/null
+++ b/Answers/Yas Hassanpour_ 40231712003/.gitignore	
@@ -0,0 +1,38 @@
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
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diff --git a/Answers/Yas Hassanpour_ 40231712003/.idea/.gitignore b/Answers/Yas Hassanpour_ 40231712003/.idea/.gitignore
new file mode 100644
index 0000000..26d3352
--- /dev/null
+++ b/Answers/Yas Hassanpour_ 40231712003/.idea/.gitignore	
@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml
diff --git a/Answers/Yas Hassanpour_ 40231712003/.idea/encodings.xml b/Answers/Yas Hassanpour_ 40231712003/.idea/encodings.xml
new file mode 100644
index 0000000..aa00ffa
--- /dev/null
+++ b/Answers/Yas Hassanpour_ 40231712003/.idea/encodings.xml	
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/src/main/resources" charset="UTF-8" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/Answers/Yas Hassanpour_ 40231712003/.idea/misc.xml b/Answers/Yas Hassanpour_ 40231712003/.idea/misc.xml
new file mode 100644
index 0000000..82dbec8
--- /dev/null
+++ b/Answers/Yas Hassanpour_ 40231712003/.idea/misc.xml	
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="MavenProjectsManager">
+    <option name="originalFiles">
+      <list>
+        <option value="$PROJECT_DIR$/pom.xml" />
+      </list>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="17" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/Answers/Yas Hassanpour_ 40231712003/.idea/vcs.xml b/Answers/Yas Hassanpour_ 40231712003/.idea/vcs.xml
new file mode 100644
index 0000000..b2bdec2
--- /dev/null
+++ b/Answers/Yas Hassanpour_ 40231712003/.idea/vcs.xml	
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/Answers/Yas Hassanpour_ 40231712003/pom.xml b/Answers/Yas Hassanpour_ 40231712003/pom.xml
new file mode 100644
index 0000000..86764f8
--- /dev/null
+++ b/Answers/Yas Hassanpour_ 40231712003/pom.xml	
@@ -0,0 +1,17 @@
+<?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>org.example</groupId>
+    <artifactId>Yas_Hassanpour_40231712003</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+</project>
\ No newline at end of file
diff --git a/Answers/Yas Hassanpour_ 40231712003/src/main/java/org/example/Main.java b/Answers/Yas Hassanpour_ 40231712003/src/main/java/org/example/Main.java
new file mode 100644
index 0000000..d5e5665
--- /dev/null
+++ b/Answers/Yas Hassanpour_ 40231712003/src/main/java/org/example/Main.java	
@@ -0,0 +1,182 @@
+//402 3171 2003
+//یاس حسن پور
+package org.example;
+
+import java.util.Arrays;
+import java.util.Scanner;
+
+public class Main {
+   static String fullName(String name, String lastName)
+    {
+        String lowerCaseN= name.toLowerCase();
+        String lowerCaseLN= lastName.toLowerCase();
+        char[] firstNameCharArray =lowerCaseN.toCharArray();
+        char[] lastNameCharArray= lowerCaseLN.toCharArray();
+        if(firstNameCharArray.length > 0)
+        {
+            firstNameCharArray[0] = Character.toUpperCase(firstNameCharArray[0]);
+        }
+        if(lastNameCharArray.length > 0)
+        {
+            lastNameCharArray[0] = Character.toUpperCase(lastNameCharArray[0]);
+        }
+        return new String(firstNameCharArray) + " " + new String(lastNameCharArray);
+    }
+    static String phoneNumber (String phone)
+    {
+        if(phone.startsWith("9") && phone.length()==10)
+        {
+            return "0"+phone;
+        }
+        if(phone.startsWith("0")&& phone.length()==11)
+        {
+            return phone;
+        }
+        if(!phone.startsWith("9")||phone.length()<10||phone.length()>11)
+        {
+            return "Wrong entry! Try again.";
+        }
+        return "Unknown error! Please check the input.";
+    }
+    static String userID(String id)
+    {
+        if(id.length()>=4 && id.length()<=13)
+        {
+            return id;
+        }
+        else
+        {
+            return "Invalid user ID. Try again.";
+        }
+
+    }
+    static String[] getInterests(String[] userInterests)
+    {
+
+        for(int i=0; i<userInterests.length; i++) {
+            if (userInterests[i].equalsIgnoreCase("done")) {
+                return Arrays.copyOf(userInterests, i);
+            }
+        }
+        return userInterests;
+    }
+    static void userFullInformation(String fullName, String phoneNumber, String userID, String[] interests)
+    {
+        System.out.println("Hello, my name is "+fullName+". "+"My ID is "+userID+". "+"Here are some of my interests:");
+        for(int i =0; i< interests.length; i++)
+        {
+            System.out.println((i+1)+". "+interests[i]);
+        }
+        System.out.println("\nYou can reach me via my phone number "+ phoneNumber+".");
+    }
+
+    static String informationEncoder(String  information, int shift) {
+        String encoderResult= "";
+        for (int i = 0; i < information.length(); i++) {
+            char currentChar = information.charAt(i);
+            if (Character.isLetter(currentChar)) {
+                if (Character.isUpperCase(currentChar)) {
+                    char encryptedChar = (char) ('A' + (currentChar - 'A' + shift) % 26);
+                    encoderResult += encryptedChar;
+                } else if (Character.isLowerCase(currentChar)) {
+                    char encryptedChar = (char) ('a' + (currentChar - 'a' + shift) % 26);
+                    encoderResult += encryptedChar;
+                }
+            } else {
+                encoderResult += currentChar;
+            }
+
+        }
+        return encoderResult;
+    }
+
+    static String informationDecoder(String EncodedInformation, int shift) {
+        String decoderResult = "";
+        for (int i = 0; i < EncodedInformation.length(); i++) {
+            char currentChar = EncodedInformation.charAt(i);
+            if (Character.isLetter(currentChar)) {
+                if (Character.isLowerCase(currentChar)) {
+                    char shiftedChar = (char) ((currentChar - 'a' - shift + 26) % 26 + 'a');
+                    decoderResult += shiftedChar;
+                } else if (Character.isUpperCase(currentChar)) {
+                    char shiftedChar = (char) ((currentChar - 'A' - shift + 26) % 26 + 'A');
+                    decoderResult += shiftedChar;
+                }
+            } else {
+                decoderResult += currentChar;
+            }
+        }
+        return decoderResult;
+    }
+    public static void main(String[] args) {
+        System.out.print("Please enter your name: ");
+        Scanner input= new Scanner(System.in);
+        String firstName= input.nextLine();
+        System.out.print("Please enter your last name: ");
+        String lastName= input.nextLine();
+        String finalFullName = fullName(firstName,lastName);
+        System.out.println(finalFullName);
+
+        String returnedValuePhoneN;
+        String finalNumber;
+        do {
+            System.out.print("\nPlease enter your phone number: ");
+            String phNumber = input.nextLine();
+            returnedValuePhoneN = phoneNumber(phNumber);
+            finalNumber=phoneNumber(returnedValuePhoneN);
+            System.out.println(finalNumber);
+        }
+        while (returnedValuePhoneN.equals("Wrong entry! Try again."));
+
+        String returnedValueID;
+        do {
+            System.out.print("\nPlease enter your user ID: ");
+            String idNum = input.nextLine();
+            returnedValueID = userID(idNum);
+            System.out.println(returnedValueID);
+        }
+        while (returnedValueID.equals("Invalid user ID. Try again."));
+
+        System.out.print("\nWhat are your interests? If done, type \"Done\" : ");
+        String[] interests = new String [10];
+
+        for(int i=0; i<10; i++)
+        {
+            interests [i] = input.nextLine();
+            if (interests[i].equalsIgnoreCase("done"))
+            {
+                break;
+            }
+        }
+        System.out.println(Arrays.toString(getInterests(interests)));
+
+        System.out.println("\nHere is users full information:\n");
+        userFullInformation(finalFullName,finalNumber,returnedValueID, getInterests(interests));
+        System.out.println("\nYou may enter more explanation about yourself: ");
+        String encoderInput = input.nextLine();
+        System.out.println("shift: ");
+        int shift1= input.nextInt();
+        input.nextLine();
+        System.out.println("Would you like to see the encoded details? ");
+        String yesOrNo1 = input.nextLine();
+        String encodedInfo = informationEncoder(encoderInput, shift1);
+        if(yesOrNo1.equalsIgnoreCase("yes"))
+        {
+            System.out.println("\nencoded details: "+ encodedInfo);
+        }
+        System.out.println("\nwould you like to decode something? ");
+        String yesOrNo2 = input.nextLine();
+
+        if(yesOrNo2.equalsIgnoreCase("yes")) {
+            System.out.println("Please enter your encoded words to decode them: ");
+            String decoderInput = input.nextLine();
+            System.out.println("shift: ");
+            int shift2 = input.nextInt();
+            input.nextLine();
+            System.out.println(informationDecoder(decoderInput, shift2));
+        }
+        else {
+            System.out.println("Ok. Thanks for your time.");
+        }
+    }
+}
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