diff --git a/StacksAndQueues/SimplifyPath.java b/StacksAndQueues/SimplifyPath.java
index dda0985..ce1a32c 100644
--- a/StacksAndQueues/SimplifyPath.java
+++ b/StacksAndQueues/SimplifyPath.java
@@ -5,7 +5,7 @@
  
  path = "/home/", => "/home"
  path = "/a/./b/../../c/", => "/c"
- Note that absolute path always begin with ‘/’ ( root directory )
+ Note that absolute path always begin with ‘/’ ( root directory )
  Path will not have whitespace characters.
  
  http://www.programcreek.com/2014/04/leetcode-simplify-path-java/
@@ -31,12 +31,12 @@ public class SimplifyPath{
 //     return result;
 // }
     
-    public static String simplifyPath(String a) {
-        Stack<String> stack = new Stack<String>();
+//    public static String simplifyPath(String a) {
+//        Stack<String> stack = new Stack<String>();
         
         //remove all ending "/"
-        while(a.length() > 0 && a.charAt(a.length() - 1) == '/')
-            a = a.substring(0, a.length()-1);
+//       while(a.length() > 0 && a.charAt(a.length() - 1) == '/')
+//            a = a.substring(0, a.length()-1);
         
         /*suppose path = "/a/./b/../../c/"        
          * push /a
@@ -48,60 +48,88 @@ public static String simplifyPath(String a) {
          * 
          * 
         */ 
-        int start = 0;
-        for(int i = 1; i < a.length(); i++){
-            if(a.charAt(i) == '/'){
-                System.out.println("when c = / \n" + a.substring(start, i));
-                stack.push(a.substring(start, i));
-                start = i;
-            }
-            else if(i == a.length()-1){
-                System.out.println("When i = a.length()-1 \n"+a.substring(start));
-                stack.push(a.substring(start));
-            }
-        }
+//       int start = 0;
+//        for(int i = 1; i < a.length(); i++){
+//            if(a.charAt(i) == '/'){
+//                System.out.println("when c = / \n" + a.substring(start, i));
+//                stack.push(a.substring(start, i));
+//                start = i;
+//            }
+//            else if(i == a.length()-1){
+//                System.out.println("When i = a.length()-1 \n"+a.substring(start));
+//                stack.push(a.substring(start));
+//            }
+//        }
         
       
         //take the result in linkedlist    
-        LinkedList<String> result = new LinkedList<String>();
-        int back = 0;
-        while(!stack.isEmpty()){
-            String top = stack.pop();
-            System.out.println("top = " + top);
-            if(top.equals("/.") || top.equals("/")){
+//        LinkedList<String> result = new LinkedList<String>();
+//        int back = 0;
+//        while(!stack.isEmpty()){
+//            String top = stack.pop();
+//            System.out.println("top = " + top);
+//            if(top.equals("/.") || top.equals("/")){
                 //nothing
-            }
-            else if(top.equals("/.."))
-                back++;
-            else {
-                if(back > 0)
-                    back--;
-                else
-                    result.push(top);
+//            }
+//            else if(top.equals("/.."))
+//                back++;
+//            else {
+//                if(back > 0)
+//                    back--;
+//                else
+//                    result.push(top);
                     
-            }
+//            }
             
-        }
-        System.out.println("result :" );
-        for(String s : result)
-            System.out.print(s + " ");
-        System.out.println();
-        if(result.isEmpty())
-            return "/";
-        StringBuilder sb = new StringBuilder();
-        while(!result.isEmpty()){
-            String s = result.pop();
-            sb.append(s);
+//        }
+//        System.out.println("result :" );
+//        for(String s : result)
+//            System.out.print(s + " ");
+//        System.out.println();
+//        if(result.isEmpty())
+//            return "/";
+//        StringBuilder sb = new StringBuilder();
+//        while(!result.isEmpty()){
+//            String s = result.pop();
+//            sb.append(s);
             //System.out.println(sb.toString());
-        }
-        return sb.toString();
+//        }
+//        return sb.toString();
             
         
         
-    }
-    
+//    }
+
+ 
+  public String simplifyPath(String path) {
+        
+    if (path == null || path.charAt(0) != '/') 
+        return null;  
+   
+    String[] parts = path.split("/");  
+   
+    Stack stk = new Stack();  
+   
+    for (String part : parts) {  
+        if (part.equals("..") && !stk.isEmpty()) 
+             stk.pop();  
+        else if (!part.equals(".") && !part.equals("..") && !part.isEmpty())  
+             stk.push(part);  
+     
+   }  
+   
+   // print new path  
+   if (stk.isEmpty()) return "/";  
+   StringBuilder sbuild = new StringBuilder();  
+    while (!stk.isEmpty()) {  
+      sbuild.insert(0, "/" + stk.pop());  
+   }
+   return sbuild.toString();  
+   }
+ 
+ 
     public static void main(String[] args){
         String a =  "/a/./b/../../c/";
         String i = simplifyPath(a);
     }
-}
\ No newline at end of file
+}