0_0_18091151_23154.cpp: In function 'void Add_edge(int, int, int)':
0_0_18091151_23154.cpp:28:5: error: reference to 'next' is ambiguous
next[tot] = fir[u], fir[u] = tot ++;
^
0_0_18091151_23154.cpp:20:13: note: candidates are: int next [1110]
int fir[N], next[N * 2], tot;
^
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_18091151_23154.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_18091151_23154.cpp: In function 'void dfs(int, int)':
0_0_18091151_23154.cpp:47:29: error: reference to 'next' is ambiguous
for(i = fir[u]; ~i; i = next[i])
^
0_0_18091151_23154.cpp:20:13: note: candidates are: int next [1110]
int fir[N], next[N * 2], tot;
^
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_18091151_23154.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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