diff --git a/CodingInterview.md b/CodingInterview.md
index e8c1160..58428fd 100644
--- a/CodingInterview.md
+++ b/CodingInterview.md
@@ -44,4 +44,5 @@
 | 38 | [字符串的排列](https://www.nowcoder.com/practice/fe6b651b66ae47d7acce78ffdd9a96c7?tpId=13&tqId=11180&tPage=2&rp=1&ru=%2Fta%2Fcoding-interviews&qru=%2Fta%2Fcoding-interviews%2Fquestion-ranking) | [47. Permutations II](solutions/47.%20Permutations%20II.md)| 有重复元素 | 
 | 38 | 扩展：字符串的组合 | [77. Combinations](solutions/77.%20Combinations.md)| 
 | 39 | [数组中出现次数超过一半的数字](https://www.nowcoder.com/practice/e8a1b01a2df14cb2b228b30ee6a92163?tpId=13&tqId=11181&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking) | [169. Majority Element](solutions/169.%20Majority%20Element.md)| 
+| 40 | [最小的k个数](https://www.nowcoder.com/practice/6a296eb82cf844ca8539b57c23e6e9bf?tpId=13&tqId=11182&tPage=2&rp=1&ru=%2Fta%2Fcoding-interviews&qru=%2Fta%2Fcoding-interviews%2Fquestion-ranking) | [215. Kth Largest Element in an Array](solutions/215.%20Kth%20Largest%20Element%20in%20an%20Array.md)| 略有不同 |