diff --git a/enumerative_combinatorics/bell_number/sol/correct.cpp b/enumerative_combinatorics/bell_number/sol/correct.cpp index 3f4b0dcd..a7df0fec 100644 --- a/enumerative_combinatorics/bell_number/sol/correct.cpp +++ b/enumerative_combinatorics/bell_number/sol/correct.cpp @@ -4,6 +4,7 @@ #include #include #include +#include using namespace std;