제출 #63232

실행 실패 (제출 코드 컴파일 에러)

Main.cpp:11:1: error: reference to ‘relation’ is ambiguous
   11 | relation f[2000];
      | ^~~~~~~~
In file included from /usr/include/c++/11/compare:39,
                 from /usr/include/c++/11/bits/stl_pair.h:65,
                 from /usr/include/c++/11/bits/stl_algobase.h:64,
                 from /usr/include/c++/11/bits/char_traits.h:39,
                 from /usr/include/c++/11/ios:40,
                 from /usr/include/c++/11/ostream:38,
                 from /usr/include/c++/11/iostream:39,
                 from Main.cpp:1:
/usr/include/c++/11/concepts:349:13: note: candidates are: ‘template<class _Rel, class _Tp, class _Up> concept std::relation’
  349 |     concept relation
      |             ^~~~~~~~
Main.cpp:7:8: note:                 ‘struct relation’
    7 | struct relation
      |        ^~~~~~~~
Main.cpp: In function ‘int main()’:
Main.cpp:27:9: error: ‘f’ was not declared in this scope
   27 |         f[x].arr[y] = 1;
      |         ^
Main.cpp: In function ‘void task(int, int)’:
Main.cpp:45:13: error: ‘f’ was not declared in this scope
   45 |         if (f[idx].arr[j] == 1 && !visited[idx])
      |             ^