diff --git a/group01/1925347167/1925347167.md b/group01/1925347167/1925347167.md
new file mode 100644
index 0000000000..8b13789179
--- /dev/null
+++ b/group01/1925347167/1925347167.md
@@ -0,0 +1 @@
+
diff --git a/group01/1925347167/Week1 Basic Data Structure/ArrayList.java b/group01/1925347167/Week1 Basic Data Structure/ArrayList.java
new file mode 100644
index 0000000000..2797e0b129
--- /dev/null
+++ b/group01/1925347167/Week1 Basic Data Structure/ArrayList.java	
@@ -0,0 +1,64 @@
+package com.coding.basic;
+
+import java.util.Arrays;
+
+public class ArrayList implements List {
+	
+	private int size = 0;
+	
+	private Object[] elementData = new Object[100];
+	
+	public void add(Object o){
+		if (fullCheck())
+			elementData = Arrays.copyOf(elementData, size*2);
+		elementData[size++] = o;
+	}
+	public void add(int index, Object o){
+		
+		if (fullCheck())
+			elementData = Arrays.copyOf(elementData, size*2);
+		if (!rangeCheck(index))
+			throw new IndexOutOfBoundsException();
+		for (int i = size; i > index; --i) 
+			elementData[i] = elementData[i-1];
+		elementData[index] = o;
+		size++;
+	}
+	
+	public Object get(int index){
+		if (rangeCheck(index))
+			return elementData[index];
+		throw new IndexOutOfBoundsException();
+	}
+	
+	public Object remove(int index){
+		if (!rangeCheck(index))
+			throw new IndexOutOfBoundsException();
+		Object rmo = elementData[index];
+		for (int i = index; i < size-1; ++i)
+			elementData[i] = elementData[i-1];
+		size--;
+		return rmo;
+	}
+	
+	public int size(){
+		return size;
+	}
+	
+	public Iterator iterator(){
+		return null;
+	}
+	
+	private boolean rangeCheck(int index) {
+		if (index < 0 || index >= size)
+			return false;
+		return true;
+	}
+	
+	private boolean fullCheck() {
+		if (size >= elementData.length)
+			return true;
+		return false;
+	}
+	
+}
diff --git a/group01/1925347167/Week1 Basic Data Structure/BinaryTreeNode.java b/group01/1925347167/Week1 Basic Data Structure/BinaryTreeNode.java
new file mode 100644
index 0000000000..45827be3a5
--- /dev/null
+++ b/group01/1925347167/Week1 Basic Data Structure/BinaryTreeNode.java	
@@ -0,0 +1,38 @@
+package com.coding.basic;
+
+public class BinaryTreeNode {
+	
+	private Object data;
+	private BinaryTreeNode left;
+	private BinaryTreeNode right;
+	
+	public BinaryTreeNode(Object o) {
+		data = o;
+		left = null;
+		right = null;
+	}
+	
+	public Object getData() {
+		return data;
+	}
+	public void setData(Object data) {
+		this.data = data;
+	}
+	public BinaryTreeNode getLeft() {
+		return left;
+	}
+	public void setLeft(BinaryTreeNode left) {
+		this.left = left;
+	}
+	public BinaryTreeNode getRight() {
+		return right;
+	}
+	public void setRight(BinaryTreeNode right) {
+		this.right = right;
+	}
+	
+	public BinaryTreeNode insert(Object o){
+		return  null;
+	}
+	
+}
diff --git a/group01/1925347167/Week1 Basic Data Structure/Iterator.java b/group01/1925347167/Week1 Basic Data Structure/Iterator.java
new file mode 100644
index 0000000000..06ef6311b2
--- /dev/null
+++ b/group01/1925347167/Week1 Basic Data Structure/Iterator.java	
@@ -0,0 +1,7 @@
+package com.coding.basic;
+
+public interface Iterator {
+	public boolean hasNext();
+	public Object next();
+
+}
diff --git a/group01/1925347167/Week1 Basic Data Structure/LinkedList.java b/group01/1925347167/Week1 Basic Data Structure/LinkedList.java
new file mode 100644
index 0000000000..3097f69edc
--- /dev/null
+++ b/group01/1925347167/Week1 Basic Data Structure/LinkedList.java	
@@ -0,0 +1,127 @@
+package com.coding.basic;
+
+public class LinkedList implements List {
+	
+	private Node head;
+	
+	private int size = 0;
+	
+	public void add(Object o){
+		Node tmp = head;
+		while (tmp.next != null)
+			tmp = tmp.next;
+		
+		Node n = new Node(o);
+		tmp.next = n;
+		size++;
+	}
+	public void add(int index , Object o){
+		if (!rangeCheck(index))
+			throw new IndexOutOfBoundsException();
+		
+		if (index == 0) {
+            Node newhead = new Node(o);
+            newhead.next = head;
+            head = newhead;
+        } else {
+            Node tmp = head;
+            for (int i = 0; i < index - 1; ++i) 
+            	tmp = tmp.next;
+            Node node = new Node(o);
+            node.next = tmp.next;
+            tmp.next = node;
+        }
+
+        size++;	
+	}
+	public Object get(int index){
+		if (!rangeCheck(index))
+			throw new IndexOutOfBoundsException();
+		Node tmp = head;
+        for (int i = 0; i < index - 1; ++i) 
+        	tmp = tmp.next;
+        return tmp.data;
+
+	}
+	
+	public Object remove(int index){
+		if (!rangeCheck(index))
+			throw new IndexOutOfBoundsException();
+		
+		if (index == 0) {
+            Node  oldHead= head;
+            head = head.next;
+            size--;	
+            return oldHead.data;
+        }else {
+			Node tmp = head;
+	        for (int i = 0; i < index - 1; i++) {
+	        	tmp = tmp.next;
+	        }
+	        Node node = tmp.next;
+	        tmp.next = node.next;
+	        size--;
+	        return node.data;
+        }
+	}
+	
+	public int size(){
+		return size;
+	}
+	
+	public void addFirst(Object o){
+		Node newHead = new Node(o);
+		newHead.next = head;
+        head = newHead;
+        size++;
+	}
+	public void addLast(Object o){
+		Node tmp = head;
+        while (tmp.next != null) {
+        	tmp = tmp.next;
+        }
+        Node node = new Node(o);
+        tmp.next = node;
+        size++;
+	}
+	public Object removeFirst(){
+		if (head == null) 
+            throw new IndexOutOfBoundsException();
+        Node oldHead = head;
+        head = head.next;
+        size--;
+        return oldHead.data;
+	}
+	public Object removeLast(){
+		if (head == null) 
+            throw new IndexOutOfBoundsException();
+        Node tmp = head;
+        while (tmp.next.next != null) {
+        	tmp = tmp.next;
+        }
+        Node node = tmp.next;
+        tmp.next = null;
+        size--;
+        return node.data;
+	}
+	public Iterator iterator(){
+		return null;
+	}
+	
+	private boolean rangeCheck(int index) {
+		if (index < 0 || index >= size)
+			return false;
+		return true;
+	}
+	
+	private static  class Node{
+		Object data;
+		Node next;
+		
+		Node(Object data) {
+            this.data = data;
+            next = null;
+        }
+		
+	}
+}
diff --git a/group01/1925347167/Week1 Basic Data Structure/List.java b/group01/1925347167/Week1 Basic Data Structure/List.java
new file mode 100644
index 0000000000..10d13b5832
--- /dev/null
+++ b/group01/1925347167/Week1 Basic Data Structure/List.java	
@@ -0,0 +1,9 @@
+package com.coding.basic;
+
+public interface List {
+	public void add(Object o);
+	public void add(int index, Object o);
+	public Object get(int index);
+	public Object remove(int index);
+	public int size();
+}
diff --git a/group01/1925347167/Week1 Basic Data Structure/Queue.java b/group01/1925347167/Week1 Basic Data Structure/Queue.java
new file mode 100644
index 0000000000..b8c394b833
--- /dev/null
+++ b/group01/1925347167/Week1 Basic Data Structure/Queue.java	
@@ -0,0 +1,24 @@
+package com.coding.basic;
+
+public class Queue {
+	
+	private LinkedList llist = new LinkedList();
+	
+	public void enQueue(Object o){	
+		llist.add(o);
+	}
+	
+	public Object deQueue(){
+		if (isEmpty())
+            return null;
+        return llist.removeFirst();
+	}
+	
+	public boolean isEmpty(){
+		return (llist.size()==0);
+	}
+	
+	public int size(){
+		return -llist.size();
+	}
+}
diff --git a/group01/1925347167/Week1 Basic Data Structure/Stack.java b/group01/1925347167/Week1 Basic Data Structure/Stack.java
new file mode 100644
index 0000000000..4458cb61d7
--- /dev/null
+++ b/group01/1925347167/Week1 Basic Data Structure/Stack.java	
@@ -0,0 +1,28 @@
+package com.coding.basic;
+
+public class Stack {
+	
+	private ArrayList elementData = new ArrayList();
+	
+	public void push(Object o){		
+		elementData.add(o);
+	}
+	
+	public Object pop(){
+		if (isEmpty())
+            return null;
+        return elementData.remove(elementData.size() - 1);
+	}
+	
+	public Object peek(){
+		if (elementData.size() == 0) 
+			return null;
+        return elementData.get(elementData.size() - 1);
+	}
+	public boolean isEmpty(){
+		return (elementData.size() == 0);
+	}
+	public int size(){
+		return elementData.size();
+	}
+}
diff --git a/group01/1925347167/Week1 Basic Data Structure/readme.md b/group01/1925347167/Week1 Basic Data Structure/readme.md
new file mode 100644
index 0000000000..8b13789179
--- /dev/null
+++ b/group01/1925347167/Week1 Basic Data Structure/readme.md	
@@ -0,0 +1 @@
+