diff --git a/template.cc b/template.cc
index 8fe208b..9bb2710 100644
--- a/template.cc
+++ b/template.cc
@@ -1,8 +1,4 @@
-#pragma GCC diagnostic ignored "-Wunused-const-variable"
-#pragma GCC diagnostic ignored "-Wreorder"
-#pragma GCC diagnostic ignored "-Wunknown-pragmas"
-#pragma GCC diagnostic ignored "-Wshift-op-parentheses"
-#pragma GCC diagnostic ignored "-Wlogical-op-parentheses"
+// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2")
 #pragma GCC optimize("Ofast")
 /************* This code requires C++17. ***************/
 
@@ -399,9 +395,10 @@ bool chmin(T& lhs, const U& rhs) {
     return ret;
 }
 
-#define functor(func) [&](auto&&... val) \
+#define functor(func) ([&](auto&&... val) \
 noexcept(noexcept(func(std::forward<decltype(val)>(val)...))) -> decltype(auto) \
-{return func(std::forward<decltype(val)>(val)...);}
+{return func(std::forward<decltype(val)>(val)...);})
+#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); })
 template <typename Func, typename RandomIt> void sort_by_key(RandomIt first, RandomIt last, Func extractor) {
     std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); });
 }