no message

Author: Chris Wu

problems/design-linked-list.py

@@ -0,0 +1,25 @@
+class Node(object):
+    def __init__(self, val):
+        self.val = val
+        self.next = None
+
+class MyLinkedList(object):
+    def __init__(self):
+        self.l = []
+
+    def get(self, index):
+        if index<0 or index>=len(self.l):
+            return -1
+        return self.l[index].val
+
+    def addAtHead(self, val):
+        self.l = [Node(val)]+self.l
+
+    def addAtTail(self, val):
+        self.l = self.l+[Node(val)]
+
+    def addAtIndex(self, index, val):
+        self.l = self.l[:index]+[Node(val)]+self.l[index:]
+
+    def deleteAtIndex(self, index):
+        self.l = self.l[:index]+self.l[index+1:]