Merge pull request #166 from fffelix-huang/master

Fixed typo in lazysegtree.hpp

Author: yosupo06

atcoder/lazysegtree.hpp

@@ -26,7 +26,7 @@ struct lazy_segtree {
                   "e must work as S()");
     static_assert(
         std::is_convertible_v<decltype(mapping), std::function<S(F, S)>>,
-        "mapping must work as F(F, S)");
+        "mapping must work as S(F, S)");
     static_assert(
         std::is_convertible_v<decltype(composition), std::function<F(F, F)>>,
         "composition must work as F(F, F)");