Leetcode 206

Python

Author: kyle8998

Diff for: README.md

@@ -47,6 +47,7 @@ Personal Practice Set - Doing One a Day (sometimes) in a Variety of Languages!!
 | 136| Easy       | [Single Number](leetcode/136-Easy-Single-Number/problem.md)                                  | [Python](leetcode/136-Easy-Single-Number/answer.py)              |
 | 137| Medium     | [Single Number II](leetcode/137-Medium-Single-Number-II/problem.md)                          | [Python](leetcode/137-Medium-Single-Number-II/answer.py)         |
 | 141| Easy       | [Linked List Cycle](leetcode/141-Easy-Linked-List-Cycle/problem.md)                          | [Python](leetcode/141-Easy-Linked-List-Cycle/answer.py)          |
+| 206| Easy       | [Reverse Linked List](leetcode/206-Easy-Reverse-Linked-List/problem.md)                      | [Python](leetcode/206-Easy-Reverse-Linked-List/answer.py)        |
 | 208| Medium     | [Implement Trie](leetcode/208-Medium-Implement-Trie/problem.md)                              | [Java](leetcode/208-Medium-Implement-Trie/answer.java)           |
 | 297| Hard       | [Serialize and Deserialize Binary Tree](leetcode/297-Hard-Serialize-And-Deserialize-Binary-Tree/problem.md) | [Java](leetcode/297-Hard-Serialize-And-Deserialize-Binary-Tree/answer.java) |
 

Diff for: leetcode/206-Easy-Reverse-Linked-List/answer.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python
+
+#-------------------------------------------------------------------------------
+# Definition for singly-linked list.
+# class ListNode:
+#     def __init__(self, x):
+#         self.val = x
+#         self.next = None
+
+class Solution:
+    def reverseList(self, head):
+        """
+        :type head: ListNode
+        :rtype: ListNode
+        """
+        prev = None
+        
+        while head:
+            head.next, prev, head = prev, head, head.next
+            
+        return prev
+#-------------------------------------------------------------------------------
+# Testing

Diff for: leetcode/206-Easy-Reverse-Linked-List/problem.md

@@ -0,0 +1,14 @@
+# Problem 206: Reverse Linked List  
+
+
+#### Difficulty: Easy
+
+#### Problem
+
+Reverse a singly linked list.
+
+#### Example
+
+1->2->3
+
+returns 3->2->1