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View Compilation Error

0_0_14804062_16336.cpp: In function 'void dfs(int)':
0_0_14804062_16336.cpp:27:3: error: reference to 'next' is ambiguous
   next[ord[to]] = t;
   ^
0_0_14804062_16336.cpp:10:28: note: candidates are: int next [210]
 int val[maxn], line[maxn], next[maxn], ord[maxn], w[maxn], f[maxn][maxn];
                            ^
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++/vector:60,
                 from 0_0_14804062_16336.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_14804062_16336.cpp: In function 'void Solve()':
0_0_14804062_16336.cpp:40:68: error: reference to 'next' is ambiguous
    if (j - 1 >= 0) f[i][j] = max(f[i - 1][j - 1] + val[line[i]], f[next[i]][j]);
                                                                    ^
0_0_14804062_16336.cpp:10:28: note: candidates are: int next [210]
 int val[maxn], line[maxn], next[maxn], ord[maxn], w[maxn], f[maxn][maxn];
                            ^
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++/vector:60,
                 from 0_0_14804062_16336.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_14804062_16336.cpp:41:21: error: reference to 'next' is ambiguous
    else f[i][j] = f[next[i]][j];
                     ^
0_0_14804062_16336.cpp:10:28: note: candidates are: int next [210]
 int val[maxn], line[maxn], next[maxn], ord[maxn], w[maxn], f[maxn][maxn];
                            ^
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++/vector:60,
                 from 0_0_14804062_16336.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_14804062_16336.cpp: In function 'void do_clear()':
0_0_14804062_16336.cpp:52:9: error: reference to 'next' is ambiguous
  memset(next, 0, sizeof(next));
         ^
0_0_14804062_16336.cpp:10:28: note: candidates are: int next [210]
 int val[maxn], line[maxn], next[maxn], ord[maxn], w[maxn], f[maxn][maxn];
                            ^
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++/vector:60,
                 from 0_0_14804062_16336.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_14804062_16336.cpp:52:25: error: reference to 'next' is ambiguous
  memset(next, 0, sizeof(next));
                         ^
0_0_14804062_16336.cpp:10:28: note: candidates are: int next [210]
 int val[maxn], line[maxn], next[maxn], ord[maxn], w[maxn], f[maxn][maxn];
                            ^
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++/vector:60,
                 from 0_0_14804062_16336.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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