diff --git a/src/7/23/T637677d.cpp b/src/7/23/T637677d.cpp
index 77944ea..b0198b4 100644
--- a/src/7/23/T637677d.cpp
+++ b/src/7/23/T637677d.cpp
@@ -6,7 +6,6 @@ solution of https://www.luogu.com.cn/problem/T637677
 #include <iostream>
 #include <vector>
 #include <cmath>
-#include <climits>
 #include <algorithm>
 using namespace std;