0_0_24068424_6492.cpp: In function 'void add(int, int, int)':
0_0_24068424_6492.cpp:15:2: error: reference to 'next' is ambiguous
next[tot]=head[u];
^
0_0_24068424_6492.cpp:10:27: note: candidates are: int next [2020]
int m,n,tot,dp[N],head[N],next[2*N],tov[2*N],val[2*N];
^
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_24068424_6492.cpp:2:
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_24068424_6492.cpp: In function 'void dfs(int, int, int)':
0_0_24068424_6492.cpp:25:24: error: reference to 'next' is ambiguous
for(int i=head[u];i;i=next[i])
^
0_0_24068424_6492.cpp:10:27: note: candidates are: int next [2020]
int m,n,tot,dp[N],head[N],next[2*N],tov[2*N],val[2*N];
^
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_24068424_6492.cpp:2:
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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