diff --git a/Design HashMap.py b/Design HashMap.py
new file mode 100644
index 00000000..f1ec1944
--- /dev/null
+++ b/Design HashMap.py	
@@ -0,0 +1,36 @@
+class MyHashMap:
+
+    def __init__(self):
+        self.bucket=1000
+        self.bucketItem=1000
+        self.storage=[None]*self.bucket
+    def hash1(self,key:int)->int:
+        return key%1000
+    def hash2(self,key:int)->int:
+        return key//1000
+    def put(self, key: int, value: int) -> None:
+        bucket=self.hash1(key)
+        bucketItem=self.hash2(key)
+        if self.storage[bucket] is  None:
+            if bucket==0:
+                self.storage[bucket]=[None]*(self.bucketItem+1)
+            else:
+                self.storage[bucket]=[None]*(self.bucketItem)
+        self.storage[bucket][bucketItem]=value
+    def get(self, key: int) -> int:
+        bucket=self.hash1(key)
+        bucketItem=self.hash2(key)
+        if self.storage[bucket]==None:
+            return -1
+        value=self.storage[bucket][bucketItem]
+        if value is not None:
+            return value
+        else:
+            return -1
+    def remove(self, key: int) -> None:
+        bucket=self.hash1(key)
+        bucketItem=self.hash2(key)
+        if self.storage[bucket]==None:
+            return
+        self.storage[bucket][bucketItem]=None
+        
\ No newline at end of file
diff --git a/Implement Queue using stacks.py b/Implement Queue using stacks.py
new file mode 100644
index 00000000..2abde269
--- /dev/null
+++ b/Implement Queue using stacks.py	
@@ -0,0 +1,26 @@
+class MyQueue:
+
+    def __init__(self):
+        self.instack=[]
+        self.outstack=[]
+    def push(self, x: int) -> None:
+        self.instack.append(x)
+    def pop(self) -> int:
+        if len(self.outstack)==0:
+
+            while len(self.instack)!=0:
+                self.outstack.append(self.instack.pop())
+        return self.outstack.pop()
+
+    def peek(self) -> int:
+        if len(self.outstack)==0:
+            while len(self.instack)!=0:
+                self.outstack.append(self.instack.pop())
+
+        return self.outstack[-1]
+    
+    def empty(self) -> bool:
+        if len(self.instack)==0 and len(self.outstack)==0:
+            return True
+        else:
+            return False
\ No newline at end of file