Update

Author: grandyang

README.md

@@ -14,7 +14,7 @@ Provide all my solutions and explanations in Chinese for all the Leetcode coding
 
 Same as this: [LeetCode All in One 题目讲解汇总(持续更新中...)](https://www.cnblogs.com/grandyang/p/4606334.html)
 
-Note: All explanations are written in Github Issues, **please do not create any new issue in this project since the problem index should be consistent with the issue idex**, thanks!
+Note: All explanations are written in Github Issues, **please do not create any new issue in this project since the problem index should be consistent with the issue index**, thanks!
 
 ("$" means the problem is locked on Leetcode, "*" means the problem is related to Database, "#" means the problem is related to Shell.)