0_0_13854778_30165.cpp: In function 'void add(int, int, int, int)':
0_0_13854778_30165.cpp:18:2: error: reference to 'next' is ambiguous
next[++len] = till[a];
^
0_0_13854778_30165.cpp:14:27: note: candidates are: int next [21000]
int s, t, S, T, len, ans, next[M], till[M], go[M], f[M], fei[M], slack[M], dist[M];
^
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_13854778_30165.cpp:1:
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_13854778_30165.cpp: In function 'int Dfs(int, int)':
0_0_13854778_30165.cpp:47:33: error: reference to 'next' is ambiguous
for (i = till[k]; i && mi; i = next[i])
^
0_0_13854778_30165.cpp:14:27: note: candidates are: int next [21000]
int s, t, S, T, len, ans, next[M], till[M], go[M], f[M], fei[M], slack[M], dist[M];
^
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_13854778_30165.cpp:1:
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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