0_0_23061638_22549.cpp: In function 'void add(int, int, int, int)':
0_0_23061638_22549.cpp:14:2: error: reference to 'next' is ambiguous
next[num]=head[a];
^
0_0_23061638_22549.cpp:6:40: note: candidates are: int next [1000005]
int S,T,n,m,num,vv[1000005],C[1000005],next[1000005],head[1000005],v[1000005],q[1000005],pre[1000005],instack[1000005],b[1000005];
^
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_23061638_22549.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_23061638_22549.cpp: In function 'int spfa(int, int)':
0_0_23061638_22549.cpp:38:28: error: reference to 'next' is ambiguous
for (int i=head[u]; i; i=next[i]){
^
0_0_23061638_22549.cpp:6:40: note: candidates are: int next [1000005]
int S,T,n,m,num,vv[1000005],C[1000005],next[1000005],head[1000005],v[1000005],q[1000005],pre[1000005],instack[1000005],b[1000005];
^
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_23061638_22549.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_23061638_22549.cpp: In function 'int main()':
0_0_23061638_22549.cpp:89:28: error: reference to 'next' is ambiguous
for (int i=head[S]; i; i=next[i])
^
0_0_23061638_22549.cpp:6:40: note: candidates are: int next [1000005]
int S,T,n,m,num,vv[1000005],C[1000005],next[1000005],head[1000005],v[1000005],q[1000005],pre[1000005],instack[1000005],b[1000005];
^
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_23061638_22549.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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