0_0_18412850_1154.cpp: In function 'void DFS(int)':
0_0_18412850_1154.cpp:33:30: error: reference to 'next' is ambiguous
for(u = head[x]; u > 0; u = next[u])
^
0_0_18412850_1154.cpp:13:67: note: candidates are: int next [2200]
int save[MAXN][MAXN], va[MAXN], dep[MAXN], dpr[MAXN], head[MAXN], next[2 * MAXN], to[2 * MAXN], n, m, dpt, ss[MAXN], st[MAXN], vt[MAXN], vtot,
^
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_18412850_1154.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_18412850_1154.cpp: In function 'void work(int)':
0_0_18412850_1154.cpp:46:30: error: reference to 'next' is ambiguous
for(u = head[x]; u > 0; u = next[u])
^
0_0_18412850_1154.cpp:13:67: note: candidates are: int next [2200]
int save[MAXN][MAXN], va[MAXN], dep[MAXN], dpr[MAXN], head[MAXN], next[2 * MAXN], to[2 * MAXN], n, m, dpt, ss[MAXN], st[MAXN], vt[MAXN], vtot,
^
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_18412850_1154.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_18412850_1154.cpp: In function 'int main()':
0_0_18412850_1154.cpp:88:4: error: reference to 'next' is ambiguous
next[++tot] = head[a];
^
0_0_18412850_1154.cpp:13:67: note: candidates are: int next [2200]
int save[MAXN][MAXN], va[MAXN], dep[MAXN], dpr[MAXN], head[MAXN], next[2 * MAXN], to[2 * MAXN], n, m, dpt, ss[MAXN], st[MAXN], vt[MAXN], vtot,
^
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_18412850_1154.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_18412850_1154.cpp:91:4: error: reference to 'next' is ambiguous
next[++tot] = head[b];
^
0_0_18412850_1154.cpp:13:67: note: candidates are: int next [2200]
int save[MAXN][MAXN], va[MAXN], dep[MAXN], dpr[MAXN], head[MAXN], next[2 * MAXN], to[2 * MAXN], n, m, dpt, ss[MAXN], st[MAXN], vt[MAXN], vtot,
^
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_18412850_1154.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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