Update mo-algo-on-tree.md

diff --git a/docs/misc/mo-algo-on-tree.md b/docs/misc/mo-algo-on-tree.md
index 072c099..b5c3365 100644 (file)
--- a/docs/misc/mo-algo-on-tree.md
+++ b/docs/misc/mo-algo-on-tree.md
@@ -44,7 +44,6 @@ dfs 一棵树，然后如果 dfs 到 x 点，就 `push_back(x)` ，dfs 完 x 点
     #include <cmath>
     #include <cstdio>
     #include <iostream>
-    ```
 
     #define DEBUG printf("line:%d func:%s\n", __LINE__, __FUNCTION__);