Update README.md

kamyu104 · kamyu104 · commit 75d4a67a811c · 2015-06-04T00:07:35.000+08:00
diff --git a/README.md b/README.md
@@ -353,7 +353,7 @@ Shell
 188| [Best Time to Buy and Sell Stock IV](https://leetcode.com/problems/best-time-to-buy-and-sell-stock-iv/)| [Python](./Python/best-time-to-buy-and-sell-stock-iv.py) | _O(k * n)_ | _O(k)_ | Hard ||
 198| [House Robber](https://leetcode.com/problems/house-robber/)| [Python](./Python/house-robber.py) | _O(n)_          | _O(1)_          | Easy           ||
 213| [House Robber II](https://leetcode.com/problems/house-robber-ii/)| [C++](./C++/house-robber-ii.cpp) [Python](./Python/house-robber-ii.py) | _O(n)_          | _O(1)_          | Medium           ||
-221| [Maximal Square](https://leetcode.com/problems/maximal-square/)| [C++](./C++/maximal-square.cpp) [Python](./Python/maximal-square.py) | _O(n^2)_         | _O(n^2)_        | Medium           | EPI |
+221| [Maximal Square](https://leetcode.com/problems/maximal-square/)| [C++](./C++/maximal-square.cpp) [Python](./Python/maximal-square.py) | _O(n^2)_         | _O(n)_          | Medium           | EPI |
 
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