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View Compilation Error

0_0_39115370_21566.cpp: In function 'int main()':
0_0_39115370_21566.cpp:42:13: error: reference to 'visit' is ambiguous
   42 |             visit[i] = 0;
      |             ^~~~~
In file included from .\stdc++.h:80:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/variant:1867:5: note: candidates are: 'template<class _Res, class _Visitor, class ... _Variants> constexpr _Res std::visit(_Visitor&&, _Variants&& ...)'
 1867 |     visit(_Visitor&& __visitor, _Variants&&... __variants)
      |     ^~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/variant:1827:5: note:                 'template<class _Visitor, class ... _Variants> constexpr std::__detail::__variant::__visit_result_t<_Visitor, _Variants ...> std::visit(_Visitor&&, _Variants&& ...)'
 1827 |     visit(_Visitor&& __visitor, _Variants&&... __variants)
      |     ^~~~~
0_0_39115370_21566.cpp:7:5: note:                 'int visit [100009]'
    7 | int visit[N] = {0}; // 标记被连接过的房间
      |     ^~~~~
0_0_39115370_21566.cpp:55:9: error: reference to 'visit' is ambiguous
   55 |         visit[x] = 1;
      |         ^~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/variant:1867:5: note: candidates are: 'template<class _Res, class _Visitor, class ... _Variants> constexpr _Res std::visit(_Visitor&&, _Variants&& ...)'
 1867 |     visit(_Visitor&& __visitor, _Variants&&... __variants)
      |     ^~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/variant:1827:5: note:                 'template<class _Visitor, class ... _Variants> constexpr std::__detail::__variant::__visit_result_t<_Visitor, _Variants ...> std::visit(_Visitor&&, _Variants&& ...)'
 1827 |     visit(_Visitor&& __visitor, _Variants&&... __variants)
      |     ^~~~~
0_0_39115370_21566.cpp:7:5: note:                 'int visit [100009]'
    7 | int visit[N] = {0}; // 标记被连接过的房间
      |     ^~~~~
0_0_39115370_21566.cpp:56:9: error: reference to 'visit' is ambiguous
   56 |         visit[y] = 1;
      |         ^~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/variant:1867:5: note: candidates are: 'template<class _Res, class _Visitor, class ... _Variants> constexpr _Res std::visit(_Visitor&&, _Variants&& ...)'
 1867 |     visit(_Visitor&& __visitor, _Variants&&... __variants)
      |     ^~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/variant:1827:5: note:                 'template<class _Visitor, class ... _Variants> constexpr std::__detail::__variant::__visit_result_t<_Visitor, _Variants ...> std::visit(_Visitor&&, _Variants&& ...)'
 1827 |     visit(_Visitor&& __visitor, _Variants&&... __variants)
      |     ^~~~~
0_0_39115370_21566.cpp:7:5: note:                 'int visit [100009]'
    7 | int visit[N] = {0}; // 标记被连接过的房间
      |     ^~~~~
0_0_39115370_21566.cpp:62:13: error: reference to 'visit' is ambiguous
   62 |             visit[x] = visit[y] = 1;
      |             ^~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/variant:1867:5: note: candidates are: 'template<class _Res, class _Visitor, class ... _Variants> constexpr _Res std::visit(_Visitor&&, _Variants&& ...)'
 1867 |     visit(_Visitor&& __visitor, _Variants&&... __variants)
      |     ^~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/variant:1827:5: note:                 'template<class _Visitor, class ... _Variants> constexpr std::__detail::__variant::__visit_result_t<_Visitor, _Variants ...> std::visit(_Visitor&&, _Variants&& ...)'
 1827 |     visit(_Visitor&& __visitor, _Variants&&... __variants)
      |     ^~~~~
0_0_39115370_21566.cpp:7:5: note:                 'int visit [100009]'
    7 | int visit[N] = {0}; // 标记被连接过的房间
      |     ^~~~~
0_0_39115370_21566.cpp:62:24: error: reference to 'visit' is ambiguous
   62 |             visit[x] = visit[y] = 1;
      |                        ^~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/variant:1867:5: note: candidates are: 'template<class _Res, class _Visitor, class ... _Variants> constexpr _Res std::visit(_Visitor&&, _Variants&& ...)'
 1867 |     visit(_Visitor&& __visitor, _Variants&&... __variants)
      |     ^~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/variant:1827:5: note:                 'template<class _Visitor, class ... _Variants> constexpr std::__detail::__variant::__visit_result_t<_Visitor, _Variants ...> std::visit(_Visitor&&, _Variants&& ...)'
 1827 |     visit(_Visitor&& __visitor, _Variants&&... __variants)
      |     ^~~~~
0_0_39115370_21566.cpp:7:5: note:                 'int visit [100009]'
    7 | int visit[N] = {0}; // 标记被连接过的房间
      |     ^~~~~
0_0_39115370_21566.cpp:70:17: error: reference to 'visit' is ambiguous
   70 |             if (visit[i] && fa[i] == i) // 因为最后相当于二叉树,有且仅有一个符合条件
      |                 ^~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/variant:1867:5: note: candidates are: 'template<class _Res, class _Visitor, class ... _Variants> constexpr _Res std::visit(_Visitor&&, _Variants&& ...)'
 1867 |     visit(_Visitor&& __visitor, _Variants&&... __variants)
      |     ^~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/variant:1827:5: note:                 'template<class _Visitor, class ... _Variants> constexpr std::__detail::__variant::__visit_result_t<_Visitor, _Variants ...> std::visit(_Visitor&&, _Variants&& ...)'
 1827 |     visit(_Visitor&& __visitor, _Variants&&... __variants)
      |     ^~~~~
0_0_39115370_21566.cpp:7:5: note:                 'int visit [100009]'
    7 | int visit[N] = {0}; // 标记被连接过的房间
      |     ^~~~~


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