diff --git a/AdvancedLevel_C++/1159. Structure of a Binary Tree (30).cpp b/AdvancedLevel_C++/1159. Structure of a Binary Tree (30).cpp
index 61bea59..fbec406 100644
--- a/AdvancedLevel_C++/1159. Structure of a Binary Tree (30).cpp	
+++ b/AdvancedLevel_C++/1159. Structure of a Binary Tree (30).cpp	
@@ -76,5 +76,7 @@ int main() {
         }
         cout << (flag ? "Yes" : "No") << endl;
     }
+    free(postorder);
+    free(inorder);
     return 0;
 }
\ No newline at end of file
diff --git a/README.md b/README.md
index 022deca..d47d158 100644
--- a/README.md
+++ b/README.md
@@ -174,10 +174,10 @@ PAT的这个仓库我一直在维护，包括每次考试后新出的题目都
 | 1153 | Decode Registration Card of PAT (25) | [查看题解](https://www.liuchuo.net/archives/8023) |          模拟，排序，map           |
 | 1154 |         Vertex Coloring (25)         | [查看题解](https://www.liuchuo.net/archives/8025) |        STL的应用，set，hash        |
 | 1155 |           Heap Paths (30)            | [查看题解](https://www.liuchuo.net/archives/8027) |            深搜回溯，堆            |
-| 1156 |           Sexy Primes (20)           | [查看题解]() |               水题               |
-| 1157 |           Anniversary (25)           | [查看题解]() |            模拟，set             |
-| 1158 |       Telefraud Detection (25)       | [查看题解]() |         模拟，并查集，排序         |
-| 1159 |   Structure of a Binary Tree (30)    | [查看题解]() |        中序后序建树，树的遍历       |
+| 1156 |           Sexy Primes (20)           | [查看题解](./AdvancedLevel_C++/1156.%20Sexy%20Primes%20(20).cpp) |               水题               |
+| 1157 |           Anniversary (25)           | [查看题解](./AdvancedLevel_C++/1157.%20Anniversary%20(25).cpp) |            模拟，set             |
+| 1158 |       Telefraud Detection (25)       | [查看题解](./AdvancedLevel_C++/1158.%20Telefraud%20Detection%20(25).cpp) |         模拟，并查集，排序         |
+| 1159 |   Structure of a Binary Tree (30)    | [查看题解](./AdvancedLevel_C++/1159.%20Structure%20of%20a%20Binary%20Tree%20(30).cpp) |        中序后序建树，树的遍历       |
 
 # PAT乙级题解