0_0_14146607_11358.cpp: In function 'void add(int, int)':
0_0_14146607_11358.cpp:14:5: error: reference to 'next' is ambiguous
next[e]=first[x];
^
0_0_14146607_11358.cpp:8:23: note: candidates are: int next [200010]
int n,m,first[maxn],e,next[maxm],v[maxm],du[maxn],isin[maxn],r[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/char_traits.h:39,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:40,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
from 0_0_14146607_11358.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_14146607_11358.cpp: In function 'void solve()':
0_0_14146607_11358.cpp:39:41: error: reference to 'next' is ambiguous
for (int j=first[x];j!=-1;j=next[j]){
^
0_0_14146607_11358.cpp:8:23: note: candidates are: int next [200010]
int n,m,first[maxn],e,next[maxm],v[maxm],du[maxn],isin[maxn],r[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/char_traits.h:39,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:40,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
from 0_0_14146607_11358.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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