From 8ff4695f9cbb22a20b513a622322b907f633e539 Mon Sep 17 00:00:00 2001
From: Arshia <arshia.mahdaviani@gmail.com>
Date: Sat, 4 Jul 2026 16:34:44 +0330
Subject: [PATCH] first HW

---
 .gitignore          | 29 +++++++++++++++++++++++++++++
 .idea/.gitignore    |  5 +++++
 .idea/misc.xml      |  6 ++++++
 .idea/modules.xml   |  8 ++++++++
 .idea/vcs.xml       |  7 +++++++
 HW1.iml             | 11 +++++++++++
 src/EvenSum.java    | 25 +++++++++++++++++++++++++
 src/Factorial.java  | 26 ++++++++++++++++++++++++++
 src/Fibobin.java    | 30 ++++++++++++++++++++++++++++++
 src/HelloWorld.java |  7 +++++++
 src/Palindrome.java | 15 +++++++++++++++
 11 files changed, 169 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 .idea/.gitignore
 create mode 100644 .idea/misc.xml
 create mode 100644 .idea/modules.xml
 create mode 100644 .idea/vcs.xml
 create mode 100644 HW1.iml
 create mode 100644 src/EvenSum.java
 create mode 100644 src/Factorial.java
 create mode 100644 src/Fibobin.java
 create mode 100644 src/HelloWorld.java
 create mode 100644 src/Palindrome.java

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f68d109
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,29 @@
+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
\ No newline at end of file
diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..ea7ed09
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,5 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..47d13e9
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_23" default="true" project-jdk-name="23" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..a3c5be8
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/HW1.iml" filepath="$PROJECT_DIR$/HW1.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..46ab8e6
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+    <mapping directory="$PROJECT_DIR$/Hw1" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/HW1.iml b/HW1.iml
new file mode 100644
index 0000000..9465dd8
--- /dev/null
+++ b/HW1.iml
@@ -0,0 +1,11 @@
+<?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>
\ No newline at end of file
diff --git a/src/EvenSum.java b/src/EvenSum.java
new file mode 100644
index 0000000..5840b2e
--- /dev/null
+++ b/src/EvenSum.java
@@ -0,0 +1,25 @@
+import java.util.Scanner;
+import java.util.ArrayList;
+public class EvenSum {
+    public static void main(String[] args) {
+
+    }
+
+    public static int Even_sum(ArrayList<Integer> a) {
+
+        int sum = 0;
+        for (int i = 0; i <= a.size(); i += 2) sum += a.get(i);
+        return sum;
+    }
+    public static ArrayList<Integer> primefactor(int a) {
+
+        ArrayList<Integer> pf = new ArrayList<Integer>();
+        for (int i = 2; i < a/2; i++ )
+            if(a%i==0){
+                pf.add(i);
+                a/=i;
+            }
+        return pf;
+    }
+
+}
diff --git a/src/Factorial.java b/src/Factorial.java
new file mode 100644
index 0000000..78d7ffb
--- /dev/null
+++ b/src/Factorial.java
@@ -0,0 +1,26 @@
+public class Factorial {
+    public static void main(String[] args) {
+        int a = 3,b=6;
+        reco2(a);
+
+    }
+    public static int factorial(int a){
+        /*
+        if (a!=int){
+            throw exception;
+        }
+
+         */
+        else {
+           if (a==1||a==0)
+               return 1;
+           return a*factorial(a-1);
+        }
+        /*
+        when n is bigger than max stack:
+        use normal algo
+        */
+    }
+
+
+}
diff --git a/src/Fibobin.java b/src/Fibobin.java
new file mode 100644
index 0000000..f9cbe44
--- /dev/null
+++ b/src/Fibobin.java
@@ -0,0 +1,30 @@
+public class Fibobin {
+    public static void main(String[] args) {
+
+    }
+    public static int fib(int i){
+        int[] a = {1,1};
+        if(i==1||i==2)
+            return 1;
+        for(int j=3;j<=i;j++){
+            int temp =  a[1];
+            a[1] = a[0]+a[1];
+            a[0] = temp;
+        }
+        return a[1];
+    }
+    public static short bin(int i){
+        if(i==0)return 0;
+        if(i==1)return 1;
+        return (short)(bin(i/2)+i%2);
+    }
+    public static boolean fibobin(int n){
+        int i = 1;
+        while(true){
+        int z = fib(i)+bin(fib(i));
+        if(n==z)return true;
+        if(n<z)return false;
+        i++;
+        }
+    }
+}
diff --git a/src/HelloWorld.java b/src/HelloWorld.java
new file mode 100644
index 0000000..c42f676
--- /dev/null
+++ b/src/HelloWorld.java
@@ -0,0 +1,7 @@
+//TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
+// click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
+public class HelloWorld {
+    public static void main(String[] args) {
+        System.out.println("Hello, World!");
+    }
+}
\ No newline at end of file
diff --git a/src/Palindrome.java b/src/Palindrome.java
new file mode 100644
index 0000000..3da37b2
--- /dev/null
+++ b/src/Palindrome.java
@@ -0,0 +1,15 @@
+import java.util.Scanner;
+public class Palindrome {
+    public static void main(String[] args) {
+
+    }
+
+    public static void palindrome() {
+        Scanner s = new Scanner(System.in);
+        String input = s.next();
+
+        for(int i = 0; i < input.length()/2-1; i++) {
+            if(input.charAt(i)!=input.charAt(input.length()-i-1)) System.out.println("riddy");return;}
+        System.out.println("palindrome");
+    }
+}
\ No newline at end of file