0_0_17305589_5572.cpp: In function 'void add_edge(int, int)':
0_0_17305589_5572.cpp:15:5: error: reference to 'next' is ambiguous
next[ep] = head[u];
^
0_0_17305589_5572.cpp:12:17: note: candidates are: int next [100020]
int head[MAXN], next[2*MAXN], to[2*MAXN], level[MAXN], ep;
^
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++/algorithm:61,
from 0_0_17305589_5572.cpp:2:
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_17305589_5572.cpp: In function 'bool can(int)':
0_0_17305589_5572.cpp:33:46: error: reference to 'next' is ambiguous
for ( int e = head[n] ; e != -1; e = next[e]) {
^
0_0_17305589_5572.cpp:12:17: note: candidates are: int next [100020]
int head[MAXN], next[2*MAXN], to[2*MAXN], level[MAXN], ep;
^
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++/algorithm:61,
from 0_0_17305589_5572.cpp:2:
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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