diff --git a/.vscode/c_cpp_properties.json b/.vscode/c_cpp_properties.json
new file mode 100644
index 0000000..c2098a2
--- /dev/null
+++ b/.vscode/c_cpp_properties.json
@@ -0,0 +1,18 @@
+{
+  "configurations": [
+    {
+      "name": "linux-gcc-x64",
+      "includePath": [
+        "${workspaceFolder}/**"
+      ],
+      "compilerPath": "/usr/bin/gcc",
+      "cStandard": "${default}",
+      "cppStandard": "${default}",
+      "intelliSenseMode": "linux-gcc-x64",
+      "compilerArgs": [
+        ""
+      ]
+    }
+  ],
+  "version": 4
+}
\ No newline at end of file
diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..09431ee
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,24 @@
+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "C/C++ Runner: Debug Session",
+      "type": "cppdbg",
+      "request": "launch",
+      "args": [],
+      "stopAtEntry": false,
+      "externalConsole": false,
+      "cwd": "/home/muhib009/Hacktober_new_2025/DSA-Collection/CPP/Stacks_Queues",
+      "program": "/home/muhib009/Hacktober_new_2025/DSA-Collection/CPP/Stacks_Queues/build/Debug/outDebug",
+      "MIMode": "gdb",
+      "miDebuggerPath": "gdb",
+      "setupCommands": [
+        {
+          "description": "Enable pretty-printing for gdb",
+          "text": "-enable-pretty-printing",
+          "ignoreFailures": true
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..3e5eb95
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,59 @@
+{
+  "C_Cpp_Runner.cCompilerPath": "gcc",
+  "C_Cpp_Runner.cppCompilerPath": "g++",
+  "C_Cpp_Runner.debuggerPath": "gdb",
+  "C_Cpp_Runner.cStandard": "",
+  "C_Cpp_Runner.cppStandard": "",
+  "C_Cpp_Runner.msvcBatchPath": "",
+  "C_Cpp_Runner.useMsvc": false,
+  "C_Cpp_Runner.warnings": [
+    "-Wall",
+    "-Wextra",
+    "-Wpedantic",
+    "-Wshadow",
+    "-Wformat=2",
+    "-Wcast-align",
+    "-Wconversion",
+    "-Wsign-conversion",
+    "-Wnull-dereference"
+  ],
+  "C_Cpp_Runner.msvcWarnings": [
+    "/W4",
+    "/permissive-",
+    "/w14242",
+    "/w14287",
+    "/w14296",
+    "/w14311",
+    "/w14826",
+    "/w44062",
+    "/w44242",
+    "/w14905",
+    "/w14906",
+    "/w14263",
+    "/w44265",
+    "/w14928"
+  ],
+  "C_Cpp_Runner.enableWarnings": true,
+  "C_Cpp_Runner.warningsAsError": false,
+  "C_Cpp_Runner.compilerArgs": [],
+  "C_Cpp_Runner.linkerArgs": [],
+  "C_Cpp_Runner.includePaths": [],
+  "C_Cpp_Runner.includeSearch": [
+    "*",
+    "**/*"
+  ],
+  "C_Cpp_Runner.excludeSearch": [
+    "**/build",
+    "**/build/**",
+    "**/.*",
+    "**/.*/**",
+    "**/.vscode",
+    "**/.vscode/**"
+  ],
+  "C_Cpp_Runner.useAddressSanitizer": false,
+  "C_Cpp_Runner.useUndefinedSanitizer": false,
+  "C_Cpp_Runner.useLeakSanitizer": false,
+  "C_Cpp_Runner.showCompilationTime": false,
+  "C_Cpp_Runner.useLinkTimeOptimization": false,
+  "C_Cpp_Runner.msvcSecureNoWarnings": false
+}
\ No newline at end of file
diff --git a/CPP/Stacks_Queues/circular deque.cpp b/CPP/Stacks_Queues/circular deque.cpp
new file mode 100644
index 0000000..c5af0c1
--- /dev/null
+++ b/CPP/Stacks_Queues/circular deque.cpp	
@@ -0,0 +1,120 @@
+/*
+
+LEETCODE PROBLEM 641 IMPLEMENTED
+
+*/
+
+#include <vector>
+using namespace std;
+
+class MyCircularDeque {
+public:
+    int maxSize;          // Maximum size of the deque
+    vector<int> dq;      // Vector to store the elements of the deque
+    int front;           // Index of the front element
+    int rear;            // Index of the rear element
+
+    // Constructor to initialize the deque with size k
+    MyCircularDeque(int k) {
+        front = -1;      // Initialize front index as -1 (indicating empty)
+        rear = -1;       // Initialize rear index as -1 (indicating empty)
+        maxSize = k;     // Set maximum size
+        dq.resize(maxSize); // Resize the vector to hold maxSize elements
+    }
+    
+    // Function to insert an element at the front
+    bool insertFront(int value) {
+        if (isFull()) {
+            return false; // Return false if the deque is full
+        } else if (front == -1) {
+            // If the deque is empty, set front and rear to 0 and insert the value
+            front = 0;
+            rear = 0;
+            dq[front] = value; // Insert value at the front
+            return true; // Insertion successful
+        } else {
+            // Move front index backward and insert the value
+            front = (front + 1) % maxSize; // Wrap around if necessary
+            dq[front] = value; // Insert value at the new front
+            return true; // Insertion successful
+        }
+    }
+    
+    // Function to insert an element at the rear
+    bool insertLast(int value) {
+        if (isFull()) {
+            return false; // Return false if the deque is full
+        } else if (rear == -1) {
+            // If the deque is empty, set front and rear to 0 and insert the value
+            front = 0;
+            rear = 0;
+            dq[rear] = value; // Insert value at the rear
+            return true; // Insertion successful
+        } else {
+            // Move rear index backward and insert the value
+            rear = (rear - 1 + maxSize) % maxSize; // Wrap around if necessary
+            dq[rear] = value; // Insert value at the new rear
+            return true; // Insertion successful
+        }
+    }
+    
+    // Function to delete the front element
+    bool deleteFront() {
+        if (isEmpty()) {
+            return false; // Return false if the deque is empty
+        } else if (front == rear) {
+            // If there's only one element, reset front and rear
+            front = -1;
+            rear = -1;
+            return true; // Deletion successful
+        } else {
+            // Move front index backward
+            front = (front - 1 + maxSize) % maxSize; // Wrap around if necessary
+            return true; // Deletion successful
+        }
+    }
+    
+    // Function to delete the last element
+    bool deleteLast() {
+        if (isEmpty()) {
+            return false; // Return false if the deque is empty
+        } else if (rear == front) {
+            // If there's only one element, reset front and rear
+            front = -1;
+            rear = -1;
+            return true; // Deletion successful
+        } else {
+            // Move rear index forward
+            rear = (rear + 1) % maxSize; // Wrap around if necessary
+            return true; // Deletion successful
+        }
+    }
+    
+    // Function to get the front element
+    int getFront() {
+        if (isEmpty()) {
+            return -1; // Return -1 if the deque is empty
+        } else {
+            return dq[front]; // Return the front element
+        }
+    }
+    
+    // Function to get the last element
+    int getRear() {
+        if (isEmpty()) {
+            return -1; // Return -1 if the deque is empty
+        } else {
+            return dq[rear]; // Return the rear element
+        }
+    }
+    
+    // Function to check if the deque is empty
+    bool isEmpty() {
+        return rear == -1; // Return true if rear is -1 (indicating empty)
+    }
+    
+    // Function to check if the deque is full
+    bool isFull() {
+        return (front + 1) % maxSize == rear; // Return true if next front position equals rear
+    }
+};