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View Compilation Error

0_0_38772525_23316.cpp: In function 'void INPUT()':
0_0_38772525_23316.cpp:116:53: error: reference to 'empty' is ambiguous
  116 |                                 start.map[i][j+1] = empty;
      |                                                     ^~~~~
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/string:53,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/locale_classes.h:40,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/ios_base.h:41,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/ios:44,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/ostream:40,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/iostream:41,
                 from 0_0_38772525_23316.cpp:4:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/range_access.h:304:5: note: candidates are: 'template<class _Tp> constexpr bool std::empty(initializer_list<_Tp>)'
  304 |     empty(initializer_list<_Tp> __il) noexcept
      |     ^~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/range_access.h:294:5: note:                 'template<class _Tp, long long unsigned int _Nm> constexpr bool std::empty(const _Tp (&)[_Nm])'
  294 |     empty(const _Tp (&)[_Nm]) noexcept
      |     ^~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/range_access.h:284:5: note:                 'template<class _Container> constexpr decltype (__cont.empty()) std::empty(const _Container&)'
  284 |     empty(const _Container& __cont) noexcept(noexcept(__cont.empty()))
      |     ^~~~~
0_0_38772525_23316.cpp:15:11: note:                 'const num empty'
   15 | const num empty = {0, 0};
      |           ^~~~~
0_0_38772525_23316.cpp: In function 'void solve()':
0_0_38772525_23316.cpp:162:48: error: reference to 'empty' is ambiguous
  162 |                                 to.map[i][j] = empty;
      |                                                ^~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/range_access.h:304:5: note: candidates are: 'template<class _Tp> constexpr bool std::empty(initializer_list<_Tp>)'
  304 |     empty(initializer_list<_Tp> __il) noexcept
      |     ^~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/range_access.h:294:5: note:                 'template<class _Tp, long long unsigned int _Nm> constexpr bool std::empty(const _Tp (&)[_Nm])'
  294 |     empty(const _Tp (&)[_Nm]) noexcept
      |     ^~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/range_access.h:284:5: note:                 'template<class _Container> constexpr decltype (__cont.empty()) std::empty(const _Container&)'
  284 |     empty(const _Container& __cont) noexcept(noexcept(__cont.empty()))
      |     ^~~~~
0_0_38772525_23316.cpp:15:11: note:                 'const num empty'
   15 | const num empty = {0, 0};
      |           ^~~~~


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