0_0_26956816_1368.cpp: In function 'void add_edge(int, int, int)':
0_0_26956816_1368.cpp:23:3: error: reference to 'next' is ambiguous
{ next[++edgeNum]=head[u];head[u]=edgeNum;
^
0_0_26956816_1368.cpp:20:24: note: candidates are: int next [200100]
int edgeNum,head[maxn],next[maxn<<1],to[maxn<<1],w[maxn<<1];
^
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++/deque:60,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:60,
from 0_0_26956816_1368.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_26956816_1368.cpp: In function 'int spfa()':
0_0_26956816_1368.cpp:40:34: error: reference to 'next' is ambiguous
for(register int i=head[u];i;i=next[i])
^
0_0_26956816_1368.cpp:20:24: note: candidates are: int next [200100]
int edgeNum,head[maxn],next[maxn<<1],to[maxn<<1],w[maxn<<1];
^
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++/deque:60,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:60,
from 0_0_26956816_1368.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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