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View Compilation Error

0_0_15804182_23200.cpp: In function 'void dfs(int)':
0_0_15804182_23200.cpp:16:25: error: reference to 'begin' is ambiguous
             if(v[i][0]==begin&&!visited[i]) {
                         ^
0_0_15804182_23200.cpp:8:6: note: candidates are: char begin
 char begin,end;
      ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:42:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:52,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_15804182_23200.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/initializer_list:89:5: note:                 template<class _Tp> constexpr const _Tp* std::begin(std::initializer_list<_Tp>)
     begin(initializer_list<_Tp> __ils) noexcept
     ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:51:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_15804182_23200.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/range_access.h:87:5: note:                 template<class _Tp, long long unsigned int _Nm> _Tp* std::begin(_Tp (&)[_Nm])
     begin(_Tp (&__arr)[_Nm])
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/range_access.h:58:5: note:                 template<class _Container> decltype (__cont.begin()) std::begin(const _Container&)
     begin(const _Container& __cont) -> decltype(__cont.begin())
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/range_access.h:48:5: note:                 template<class _Container> decltype (__cont.begin()) std::begin(_Container&)
     begin(_Container& __cont) -> decltype(__cont.begin())
     ^
0_0_15804182_23200.cpp:17:29: error: reference to 'begin' is ambiguous
                   char temp=begin;
                             ^
0_0_15804182_23200.cpp:8:6: note: candidates are: char begin
 char begin,end;
      ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:42:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:52,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_15804182_23200.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/initializer_list:89:5: note:                 template<class _Tp> constexpr const _Tp* std::begin(std::initializer_list<_Tp>)
     begin(initializer_list<_Tp> __ils) noexcept
     ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:51:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_15804182_23200.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/range_access.h:87:5: note:                 template<class _Tp, long long unsigned int _Nm> _Tp* std::begin(_Tp (&)[_Nm])
     begin(_Tp (&__arr)[_Nm])
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/range_access.h:58:5: note:                 template<class _Container> decltype (__cont.begin()) std::begin(const _Container&)
     begin(const _Container& __cont) -> decltype(__cont.begin())
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/range_access.h:48:5: note:                 template<class _Container> decltype (__cont.begin()) std::begin(_Container&)
     begin(_Container& __cont) -> decltype(__cont.begin())
     ^
0_0_15804182_23200.cpp:18:19: error: reference to 'begin' is ambiguous
                   begin=v[i][v[i].length()-1];
                   ^
0_0_15804182_23200.cpp:8:6: note: candidates are: char begin
 char begin,end;
      ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:42:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:52,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_15804182_23200.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/initializer_list:89:5: note:                 template<class _Tp> constexpr const _Tp* std::begin(std::initializer_list<_Tp>)
     begin(initializer_list<_Tp> __ils) noexcept
     ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:51:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_15804182_23200.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/range_access.h:87:5: note:                 template<class _Tp, long long unsigned int _Nm> _Tp* std::begin(_Tp (&)[_Nm])
     begin(_Tp (&__arr)[_Nm])
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/range_access.h:58:5: note:                 template<class _Container> decltype (__cont.begin()) std::begin(const _Container&)
     begin(const _Container& __cont) -> decltype(__cont.begin())
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/range_access.h:48:5: note:                 template<class _Container> decltype (__cont.begin()) std::begin(_Container&)
     begin(_Container& __cont) -> decltype(__cont.begin())
     ^
0_0_15804182_23200.cpp:21:19: error: reference to 'begin' is ambiguous
                   begin=temp;
                   ^
0_0_15804182_23200.cpp:8:6: note: candidates are: char begin
 char begin,end;
      ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:42:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:52,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_15804182_23200.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/initializer_list:89:5: note:                 template<class _Tp> constexpr const _Tp* std::begin(std::initializer_list<_Tp>)
     begin(initializer_list<_Tp> __ils) noexcept
     ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:51:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_15804182_23200.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/range_access.h:87:5: note:                 template<class _Tp, long long unsigned int _Nm> _Tp* std::begin(_Tp (&)[_Nm])
     begin(_Tp (&__arr)[_Nm])
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/range_access.h:58:5: note:                 template<class _Container> decltype (__cont.begin()) std::begin(const _Container&)
     begin(const _Container& __cont) -> decltype(__cont.begin())
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/range_access.h:48:5: note:   


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