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View Compilation Error

0_0_38754347_11387.cpp: In function 'void dfs1(int)':
0_0_38754347_11387.cpp:57:24: error: 'begin' was not declared in this scope
   57 |         for(auto i: e[u]) {
      |                        ^
0_0_38754347_11387.cpp:57:24: note: suggested alternatives:
In file included from .\stdc++.h:166:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/valarray:1230:5: note:   'std::begin'
 1230 |     begin(const valarray<_Tp>& __va) noexcept
      |     ^~~~~
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/ranges_algobase.h:38,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/ranges_algo.h:38,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/algorithm:63,
                 from .\stdc++.h:51:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/ranges_base.h:489:44: note:   'std::ranges::__cust::begin'
  489 |     inline constexpr __cust_access::_Begin begin{};
      |                                            ^~~~~
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/filesystem:48,
                 from .\stdc++.h:200:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/fs_dir.h:576:3: note:   'std::filesystem::__cxx11::begin'
  576 |   begin(recursive_directory_iterator __iter) noexcept
      |   ^~~~~
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_iterator_base_types.h:71,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_algobase.h:65,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/algorithm:60:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/iterator_concepts.h:969:10: note:   'std::ranges::__cust_access::begin'
  969 |     void begin(const auto&) = delete;
      |          ^~~~~
0_0_38754347_11387.cpp:57:24: error: 'end' was not declared in this scope
   57 |         for(auto i: e[u]) {
      |                        ^
0_0_38754347_11387.cpp:57:24: note: suggested alternatives:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/valarray:1257:5: note:   'std::end'
 1257 |     end(const valarray<_Tp>& __va) noexcept
      |     ^~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/ranges_base.h:490:42: note:   'std::ranges::__cust::end'
  490 |     inline constexpr __cust_access::_End end{};
      |                                          ^~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/fs_dir.h:581:3: note:   'std::filesystem::__cxx11::end'
  581 |   end(recursive_directory_iterator) noexcept
      |   ^~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/ranges_base.h:137:10: note:   'std::ranges::__cust_access::end'
  137 |     void end(const auto&) = delete;
      |          ^~~


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