swap nodes update

Author: tech-cow

README.md

@@ -27,4 +27,4 @@ Success is like pregnancy, Everybody congratulates you but nobody knows how many
 |142|[Linked List Cycle II](https://leetcode.com/problems/linked-list-cycle-ii/#/description)| [Python](./linkedlist/detectCycleii.py) | _O(n)_| _O(1)_  | Medium |CC189 |[Video](https://www.youtube.com/watch?v=iZVBVCpmugI&t=1s)|
 |328|[Odd Even Linked List](https://leetcode.com/problems/odd-even-linked-list/#/description)| [Python](./linkedlist/oddEvenList.py) | _O(n)_| _O(1)_  | Medium | ||
 |143|[Reorder List](https://leetcode.com/problems/reorder-list/#/description)| [Python](./linkedlist/reorder.py) | _O(n)_| _O(1)_  | Medium | ||
-|24|[Swap Nodes in Pairs](https://leetcode.com/problems/swap-nodes-in-pairs/#/solutions)| [Python](./linkedlist/swapPairs.py) | _O(n)_| _O(1)_  | Medium | ||
+|24|[Swap Nodes in Pairs](https://leetcode.com/problems/swap-nodes-in-pairs/#/solutions)| [Python](./linkedlist/swapPairs.py) | _O(n)_| _O(1)_  | Medium | |[Note](http://imgur.com/a/4G6ng)|