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View Compilation Error

0_0_18760737_23422.cpp: In function 'int main()':
0_0_18760737_23422.cpp:45:7: error: reference to 'next' is ambiguous
       next[i][c] |= 1 << j;
       ^
0_0_18760737_23422.cpp:8:57: note: candidates are: int next [32768][4]
 int t , n , m , f[ 1 << 15 ] , g[ 1 << 15 ] , ans[20] , next[ 1 << 15 ][4];
                                                         ^
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_18760737_23422.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_18760737_23422.cpp:56:18: error: reference to 'next' is ambiguous
       update( g[ next[j][k] ] , f[j] );
                  ^
0_0_18760737_23422.cpp:8:57: note: candidates are: int next [32768][4]
 int t , n , m , f[ 1 << 15 ] , g[ 1 << 15 ] , ans[20] , next[ 1 << 15 ][4];
                                                         ^
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_18760737_23422.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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