0_0_14799291_21260.cpp: In function 'void add(int, int, int)':
0_0_14799291_21260.cpp:33:2: error: reference to 'next' is ambiguous
next[edge] = first[x];
^
0_0_14799291_21260.cpp:26:27: note: candidates are: int next [200010]
int first[MAXN], v[MAXN], next[MAXN], w[MAXN];
^
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++/bits/stl_tree.h:61,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/map:60,
from 0_0_14799291_21260.cpp:1:
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_14799291_21260.cpp: In function 'int dfs(int)':
0_0_14799291_21260.cpp:45:36: error: reference to 'next' is ambiguous
for(int e = first[x];e != -1; e = next[e])
^
0_0_14799291_21260.cpp:26:27: note: candidates are: int next [200010]
int first[MAXN], v[MAXN], next[MAXN], w[MAXN];
^
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++/bits/stl_tree.h:61,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/map:60,
from 0_0_14799291_21260.cpp:1:
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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