Feature/stack using two queues

.vscode/settings.json

@@ -1,5 +1,6 @@
 {
     "githubPullRequests.ignoredPullRequestBranches": [
         "master"
-    ]
+    ],
+    "python.analysis.typeCheckingMode": "basic"
 }

data_structures/stacks/TwoQueuedStack.py

@@ -0,0 +1,72 @@
+class StackUsingQueues:
+    def __init__(self) -> None:
+        """
+        Initialize the stack using two queues.
+
+        >>> stack = StackUsingQueues()
+        """
+        self.queue1 = []
+        self.queue2 = []
+
+    def push(self, item) -> None:
+        """
+        Push an item onto the stack.
+
+        >>> stack = StackUsingQueues()
+        >>> stack.push(1)
+        >>> stack.push(2)
+        >>> stack.push(3)
+        >>> stack.peek()
+        3
+        """
+        while len(self.queue1) != 0:
+            self.queue2.append(self.queue1[0])
+            self.queue1.pop(0)
+        self.queue1.append(item)
+        while len(self.queue2) != 0:
+            self.queue1.append(self.queue2[0])
+            self.queue2.pop(0)
+
+    def pop(self) -> int:
+        """
+        Pop the top item from the stack and return it.
+
+        >>> stack = StackUsingQueues()
+        >>> stack.push(1)
+        >>> stack.push(2)
+        >>> stack.pop()
+        2
+        >>> stack.pop()
+        1
+        >>> stack.pop()
+        0
+        """
+        if len(self.queue1) != 0:
+            popped = self.queue1.pop(0)
+            return popped
+        else:
+            return 0
+
+    def peek(self) -> int:
+        """
+        Return the top item from the stack without removing it.
+
+        >>> stack = StackUsingQueues()
+        >>> stack.push(1)
+        >>> stack.push(2)
+        >>> stack.peek()
+        2
+        >>> stack.pop()
+        2
+        >>> stack.peek()
+        1
+        >>> stack.pop()
+        1
+        >>> stack.peek()
+        0
+        """
+        if len(self.queue1) != 0:
+            return self.queue1[0]
+        else:
+            return 0
+