diff --git a/MyHashMap.java b/MyHashMap.java
new file mode 100644
index 00000000..6902fd27
--- /dev/null
+++ b/MyHashMap.java
@@ -0,0 +1,51 @@
+class MyHashMap {
+    int primaryBuckets;
+    int secondaryBuckets;
+    int[][] storage;
+
+    public MyHashMap() {
+        this.primaryBuckets = 1000;
+        this.secondaryBuckets = 1000;
+        this.storage = new int[primaryBuckets][]; 
+    }
+
+    private int getPrimaryHash(int key){
+        return key % primaryBuckets;
+    }
+
+    private int getSecondaryHash(int key){
+        return key / secondaryBuckets;
+    }
+    
+    public void put(int key, int value) {
+        int primaryIndex = getPrimaryHash(key);
+        if(storage[primaryIndex] == null){
+            if(primaryIndex == 0){
+                storage[primaryIndex] = new int[secondaryBuckets+1];
+            }else{
+                storage[primaryIndex] = new int[secondaryBuckets];
+            }
+            Arrays.fill(storage[primaryIndex], -1);
+        }
+        int secondaryIndex = getSecondaryHash(key);
+        storage[primaryIndex][secondaryIndex] = value;
+    }
+    
+    public void remove(int key) {
+        int primaryIndex = getPrimaryHash(key);
+        if(storage[primaryIndex] == null){
+            return;
+        }
+        int secondaryIndex = getSecondaryHash(key);
+        storage[primaryIndex][secondaryIndex] = -1;
+    }
+    
+    public int get(int key) {
+        int primaryIndex = getPrimaryHash(key);
+        if(storage[primaryIndex] == null){
+            return -1;
+        }
+        int secondaryIndex = getSecondaryHash(key);
+        return storage[primaryIndex][secondaryIndex];
+    }
+}
diff --git a/MyQueue.java b/MyQueue.java
new file mode 100644
index 00000000..4f1280c5
--- /dev/null
+++ b/MyQueue.java
@@ -0,0 +1,32 @@
+class MyQueue {
+    Stack<Integer> inSt;
+    Stack<Integer> outSt;
+
+    public MyQueue() {
+        this.inSt = new Stack<>();
+        this.outSt = new Stack<>();
+    }
+    
+    public void push(int x) {
+        inSt.push(x);
+    }
+    
+    public int pop() {
+        if(empty()) return -1;
+        peek();
+        return outSt.pop();
+    }
+    
+    public int peek() {
+        if(outSt.isEmpty()){
+            while(!inSt.isEmpty()){
+                outSt.push(inSt.pop());
+            }
+        }
+        return outSt.peek();
+    }
+    
+    public boolean empty() {
+        return inSt.isEmpty() && outSt.isEmpty();
+    }
+}