diff --git a/POJ/2104_famousdt.cpp b/POJ/2104_famousdt.cpp
index 332353f..c195808 100644
--- a/POJ/2104_famousdt.cpp
+++ b/POJ/2104_famousdt.cpp
@@ -1,3 +1,9 @@
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <algorithm>
+using namespace std;
+
 /*==========================================================*\
 | 划分树
 \*==========================================================*/