0_0_16640147_11933.cpp: In function 'void addEdge(int, int)':
0_0_16640147_11933.cpp:33:2: error: reference to 'next' is ambiguous
next[size] = head[u];
^
0_0_16640147_11933.cpp:22:26: note: candidates are: int next [200010]
int head[MAXN], e[MAXM], next[MAXM], size;
^
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_16640147_11933.cpp:6:
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_16640147_11933.cpp: In function 'void dfs(int)':
0_0_16640147_11933.cpp:50:37: error: reference to 'next' is ambiguous
for (int i = head[x]; i != -1; i = next[i]) {
^
0_0_16640147_11933.cpp:22:26: note: candidates are: int next [200010]
int head[MAXN], e[MAXM], next[MAXM], size;
^
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_16640147_11933.cpp:6:
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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