0_0_15035547_23336.cpp: In function 'void add_Edge(int, int)':
0_0_15035547_23336.cpp:40:3: error: reference to 'next' is ambiguous
next[en] = first[u];
^
0_0_15035547_23336.cpp:28:15: note: candidates are: int next [200010]
int first[N], next[N * 2], vv[N * 2], en;
^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:66:0,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:60,
from 0_0_15035547_23336.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:184:5: note: template<class _ForwardIterator> _ForwardIterator std::next(_ForwardIterator, typename std::iterator_traits<_Iter>::difference_type)
next(_ForwardIterator __x, typename
^
0_0_15035547_23336.cpp: In function 'void dfs1(int, int, int)':
0_0_15035547_23336.cpp:49:37: error: reference to 'next' is ambiguous
for (int i = first[u]; i + 1; i = next[i]) {
^
0_0_15035547_23336.cpp:28:15: note: candidates are: int next [200010]
int first[N], next[N * 2], vv[N * 2], en;
^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:66:0,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:60,
from 0_0_15035547_23336.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:184:5: note: template<class _ForwardIterator> _ForwardIterator std::next(_ForwardIterator, typename std::iterator_traits<_Iter>::difference_type)
next(_ForwardIterator __x, typename
^
0_0_15035547_23336.cpp: In function 'void dfs2(int, int)':
0_0_15035547_23336.cpp:63:37: error: reference to 'next' is ambiguous
for (int i = first[u]; i + 1; i = next[i]) {
^
0_0_15035547_23336.cpp:28:15: note: candidates are: int next [200010]
int first[N], next[N * 2], vv[N * 2], en;
^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:66:0,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:60,
from 0_0_15035547_23336.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:184:5: note: template<class _ForwardIterator> _ForwardIterator std::next(_ForwardIterator, typename std::iterator_traits<_Iter>::difference_type)
next(_ForwardIterator __x, typename
^
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