제출 #130644

실행 실패 (제출 코드 컴파일 에러)

Main.cpp:2:2: error: invalid preprocessing directive #using
    2 | #using namespace std;
      |  ^~~~~
Main.cpp: In function ‘int main()’:
Main.cpp:7:5: error: ‘cin’ was not declared in this scope; did you mean ‘std::cin’?
    7 |     cin >> num;
      |     ^~~
      |     std::cin
In file included from Main.cpp:1:
/usr/include/c++/11/iostream:60:18: note: ‘std::cin’ declared here
   60 |   extern istream cin;           /// Linked to standard input
      |                  ^~~
Main.cpp:17:5: error: ‘cout’ was not declared in this scope; did you mean ‘std::cout’?
   17 |     cout << stage + 1;
      |     ^~~~
      |     std::cout
In file included from Main.cpp:1:
/usr/include/c++/11/iostream:61:18: note: ‘std::cout’ declared here
   61 |   extern ostream cout;          /// Linked to standard output
      |                  ^~~~