diff --git a/CodeChef Cookoff october/D-or.cpp b/CodeChef Cookoff october/D-or.cpp
new file mode 100644
index 0000000..3345661
--- /dev/null
+++ b/CodeChef Cookoff october/D-or.cpp	
@@ -0,0 +1,91 @@
+#include<bits/stdc++.h>
+using namespace std;
+typedef long long int ll;
+int main(){
+    ll t;
+    cin>>t;
+    while(t--)
+    {
+        ll a,b;
+        cin>>a>>b;
+        ll p = 1;
+        while(p<b)
+        {
+            p*=2;
+        }
+        p/=2;
+        if(p-1>a)
+        {
+            cout<<(b|(p-1))<<endl;
+        }
+        else
+        {
+            ll p[64]={0},q[64]={0};
+            ll c[64] = {0};
+            swap(b,a);
+            ll r = a,w = b;
+            ll i = 0;
+            while(i<=63)
+            {
+                if(a%2==0)
+                {
+                    p[i] = 0;
+                }
+                else
+                {
+                    p[i] = 1;
+                }
+                a/=2;
+                i++;
+            }
+            i = 0;
+            while(i<=63)
+            {
+                if(b%2==0)
+                {
+                    q[i] = 0;
+                }
+                else
+                {
+                    q[i] = 1;
+                }
+                b/=2;
+                i++;
+            }
+            ll flag = 0;
+            for(int i = 63 ; i >= 0; i--)
+            {
+                if(p[i]==q[i])
+                {
+                    c[i] = p[i];
+                    continue;
+                }
+                else
+                {
+                    for(int j = i ; j >=0 ; j--)
+                    {
+                        if(p[j]==1)
+                        {
+                            for(int k = j ; k>=0 ; k--)
+                            {
+                                c[k] = 1;
+                            }
+                            break;
+                        }
+                        else
+                        {
+                            c[j]  = 0;
+                        }
+                    }
+                    break;
+                }
+            }
+            ll ans = 0;
+            for(int i = 63 ; i >= 0 ; i--)
+            {
+                ans = ans*2+c[i];
+            }
+            cout<<ans<<endl;
+        }
+    }
+}
diff --git a/CodeChef Cookoff october/cakewalk.cpp b/CodeChef Cookoff october/cakewalk.cpp
new file mode 100644
index 0000000..3a8e539
--- /dev/null
+++ b/CodeChef Cookoff october/cakewalk.cpp	
@@ -0,0 +1,44 @@
+#include<bits/stdc++.h>
+using namespace std;
+typedef long long int ll;
+set<ll>s;
+void precompute()
+{
+	for(auto it = s.begin(); it != s.end() ; it++)
+	{
+		if((*it)*10>(ll)1e18)
+		{
+			continue;
+		}
+		else
+		{
+			s.insert((*it)*10);
+		}
+		
+		if((*it)*20>(ll)1e18)
+		{
+			continue;
+		}
+		else
+		{
+			s.insert((*it)*20);
+		}
+	}
+}
+int main(){
+	s.insert(1);
+	precompute();
+	ll t;
+	cin>>t;
+	while(t--)
+	{
+	    ll n;
+	    cin>>n;
+	    if(s.find(n)==s.end()){
+	        cout<<"No"<<endl;
+	    }
+	    else{
+	        cout<<"Yes"<<endl;
+	    }
+	}
+}
diff --git a/CodeChef Cookoff october/mdedel.cpp b/CodeChef Cookoff october/mdedel.cpp
new file mode 100644
index 0000000..6bfcd7c
--- /dev/null
+++ b/CodeChef Cookoff october/mdedel.cpp	
@@ -0,0 +1,43 @@
+#include<bits/stdc++.h>
+using namespace std;
+typedef long long int ll;
+int main(){
+	ll t;
+	cin>>t;
+	while(t--)
+	{
+		ll n;
+		cin>>n;
+		ll a[n];
+		for(int i = 0 ; i< n ; i++)
+		{
+			cin>>a[i];
+		}
+		ll indx,indy;
+		indx = 0;
+		indy = 0;
+		ll max = a[0],min = a[0];
+		for(int i = 0 ;i < n ; i++)
+		{
+			if(a[i]>max)
+			{
+				max = a[i];
+				indx = i;
+			}
+			if(a[i]<min)
+			{
+				min = a[i];
+				indy = i;
+			}
+		}
+		if(indx>indy)
+		{
+			cout<<a[indy]<<" "<<a[indx];
+		}
+		else
+		{
+			cout<<a[indx]<<" "<<a[indy];
+		}
+		cout<<endl;
+	}
+}
diff --git a/GFG_JAVA/anagram.java b/GFG_JAVA/anagram.java
new file mode 100644
index 0000000..19b4d26
--- /dev/null
+++ b/GFG_JAVA/anagram.java
@@ -0,0 +1,37 @@
+import java.util.*;
+
+public class anagram {
+
+    public static void main(String[] args) {
+        String a = "silenp";
+        String b = "liste";
+        boolean isAnagram = false;
+        boolean visited[] = new boolean[b.length()];
+        if (a.length() == b.length()) {
+
+            for (int i = 0; i < a.length(); i++) {
+                char c = a.charAt(i);
+                isAnagram = false;
+                for (int j = 0; j < b.length(); j++) {
+                    if (b.charAt(j) == c && !visited[j]) {
+                        visited[j] = true;
+                        isAnagram = true;
+                        break;
+                    }
+                }
+                if (!isAnagram) {
+                    break;
+                }
+
+            }
+        }
+
+        else {
+            if (isAnagram) {
+                System.out.print("Anagram");
+            } else
+                System.out.print("Not a Anagram");
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/GFG_JAVA/palindrome.java b/GFG_JAVA/palindrome.java
new file mode 100644
index 0000000..1ee6465
--- /dev/null
+++ b/GFG_JAVA/palindrome.java
@@ -0,0 +1,29 @@
+
+package strings;
+
+public class anagram {
+
+    public static void main(String[] args) {
+		String a = "silenp";
+String b = "liste";
+boolean isAnagram = false;
+boolean visited[] = new boolean[b.length()];
+if(a.length() == b.length()) {
+
+for(int i = 0;i<a.length();i++) {
+	char c = a.charAt(i);
+	isAnagram = false;
+	for(int j = 0;j<b.length();j++) {
+		if(b.charAt(j) == c && !visited[j]) {
+			visited[j] = true;
+			isAnagram  = true;
+			break;
+		}
+	}
+	if(!isAnagram) {
+		break;
+	}
+	
+	
+}
+}
\ No newline at end of file