0_0_14151926_18835.cpp: In function 'void add(int, int)':
0_0_14151926_18835.cpp:16:5: error: reference to 'next' is ambiguous
next[e] = first[x], first[x] = e ++;
^
0_0_14151926_18835.cpp:8:27: note: candidates are: int next [200010]
int N, M, first[MAXD], e, next[MAXM], v[MAXM], dgr[MAXD], isin[MAXD], r[MAXD];
^
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_14151926_18835.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_14151926_18835.cpp: In function 'void solve()':
0_0_14151926_18835.cpp:39:44: error: reference to 'next' is ambiguous
for(j = first[x]; j != -1; j = next[j])
^
0_0_14151926_18835.cpp:8:27: note: candidates are: int next [200010]
int N, M, first[MAXD], e, next[MAXM], v[MAXM], dgr[MAXD], isin[MAXD], r[MAXD];
^
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_14151926_18835.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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