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View Compilation Error

0_0_14649334_28119.cpp: In function 'void add(int, flag)':
0_0_14649334_28119.cpp:26:3: error: reference to 'next' is ambiguous
   next[s[x]]=tot;
   ^
0_0_14649334_28119.cpp:10:24: note: candidates are: int next [200100]
 int n,m,Test,K,ans,tot,next[M],s[N],to[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++/algorithm:61,
                 from 0_0_14649334_28119.cpp:4:
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_14649334_28119.cpp: In function 'int main()':
0_0_14649334_28119.cpp:36:10: error: reference to 'next' is ambiguous
   memset(next,0,sizeof(next));
          ^
0_0_14649334_28119.cpp:10:24: note: candidates are: int next [200100]
 int n,m,Test,K,ans,tot,next[M],s[N],to[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++/algorithm:61,
                 from 0_0_14649334_28119.cpp:4:
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_14649334_28119.cpp:36:24: error: reference to 'next' is ambiguous
   memset(next,0,sizeof(next));
                        ^
0_0_14649334_28119.cpp:10:24: note: candidates are: int next [200100]
 int n,m,Test,K,ans,tot,next[M],s[N],to[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++/algorithm:61,
                 from 0_0_14649334_28119.cpp:4:
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_14649334_28119.cpp:46:10: error: reference to 'next' is ambiguous
    while(next[to[e[i].fr]] && w[next[to[e[i].fr]]].v+K<=e[i].v) 
          ^
0_0_14649334_28119.cpp:10:24: note: candidates are: int next [200100]
 int n,m,Test,K,ans,tot,next[M],s[N],to[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++/algorithm:61,
                 from 0_0_14649334_28119.cpp:4:
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_14649334_28119.cpp:46:33: error: reference to 'next' is ambiguous
    while(next[to[e[i].fr]] && w[next[to[e[i].fr]]].v+K<=e[i].v) 
                                 ^
0_0_14649334_28119.cpp:10:24: note: candidates are: int next [200100]
 int n,m,Test,K,ans,tot,next[M],s[N],to[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++/algorithm:61,
                 from 0_0_14649334_28119.cpp:4:
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_14649334_28119.cpp:47:17: error: reference to 'next' is ambiguous
     to[e[i].fr]=next[to[e[i].fr]];
                 ^
0_0_14649334_28119.cpp:10:24: note: candidates are: int next [200100]
 int n,m,Test,K,ans,tot,next[M],s[N],to[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++/algorithm:61,
                 from 0_0_14649334_28119.cpp:4:
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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