Update README.md

kamyu104 · web-flow · commit 0b42c9dcf1fc · 2017-10-01T20:14:23.000+08:00
diff --git a/README.md b/README.md
@@ -160,7 +160,7 @@ I'll keep updating for full summary and better solutions. Stay tuned for updates
 678| [Valid Parenthesis String](https://leetcode.com/problems/valid-parenthesis-string/) |[C++](./C++/valid-parenthesis-string.cpp)  [Python](./Python/valid-parenthesis-string.py) | _O(n)_ | _O(1)_ | Medium         | |
 680| [Valid Palindrome II](https://leetcode.com/problems/valid-palindrome-ii/) | [C++](./C++/valid-palindrome-ii.cpp) [Python](./Python/valid-palindrome-ii.py) | _O(n)_  | _O(1)_         | Easy           ||
 681| [Next Closest Time](https://leetcode.com/problems/next-closest-time/) | [C++](./C++/next-closest-time.cpp) [Python](./Python/next-closest-time.py) | _O(1)_  | _O(1)_         | Medium           ||
-686 | [Repeated String Match](https://leetcode.com/problems/lrepeated-string-match/) | [C++](./C++/repeated-string-match.cpp) [Python](./Python/repeated-string-match.py) | _O(n + m)_ | _O(1)_ | Easy || `Rabin-Karp Algorithm` |
+686 | [Repeated String Match](https://leetcode.com/problems/repeated-string-match/) | [C++](./C++/repeated-string-match.cpp) [Python](./Python/repeated-string-match.py) | _O(n + m)_ | _O(1)_ | Easy || `Rabin-Karp Algorithm` |
 
 ## Linked List
 |  #  | Title           |  Solution       |  Time           | Space           | Difficulty    | Tag          | Note| 
