diff --git a/src/U206625/U206625.cpp b/src/U206625/U206625.cpp
index 53b3c5a..1556b03 100644
--- a/src/U206625/U206625.cpp
+++ b/src/U206625/U206625.cpp
@@ -1,9 +1,8 @@
 #include <iostream>
 #include <ranges>
-#include <stack>
 
 
-using std::cin, std::cout, std::string, std::stack;
+using std::cin, std::cout, std::string;
 using ull = unsigned long long;
 constexpr auto range = std::ranges::views::iota;