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View Compilation Error

0_0_16213387_3000.cpp: In function 'int main()':
0_0_16213387_3000.cpp:68:13: error: reference to 'prev' is ambiguous
             prev[i][0] = k-1;
             ^
0_0_16213387_3000.cpp:37:5: note: candidates are: int prev [100010][22]
 int prev[100010][22];
     ^
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_16213387_3000.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:193:5: note:                 template<class _BidirectionalIterator> _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type)
     prev(_BidirectionalIterator __x, typename
     ^
0_0_16213387_3000.cpp:70:9: error: reference to 'prev' is ambiguous
         prev[0][0] = 0;
         ^
0_0_16213387_3000.cpp:37:5: note: candidates are: int prev [100010][22]
 int prev[100010][22];
     ^
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_16213387_3000.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:193:5: note:                 template<class _BidirectionalIterator> _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type)
     prev(_BidirectionalIterator __x, typename
     ^
0_0_16213387_3000.cpp:73:13: error: reference to 'prev' is ambiguous
             prev[0][j] = 0;
             ^
0_0_16213387_3000.cpp:37:5: note: candidates are: int prev [100010][22]
 int prev[100010][22];
     ^
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_16213387_3000.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:193:5: note:                 template<class _BidirectionalIterator> _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type)
     prev(_BidirectionalIterator __x, typename
     ^
0_0_16213387_3000.cpp:76:17: error: reference to 'prev' is ambiguous
                 prev[i][j] = prev[prev[i][j-1]][j-1];
                 ^
0_0_16213387_3000.cpp:37:5: note: candidates are: int prev [100010][22]
 int prev[100010][22];
     ^
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_16213387_3000.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:193:5: note:                 template<class _BidirectionalIterator> _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type)
     prev(_BidirectionalIterator __x, typename
     ^
0_0_16213387_3000.cpp:76:30: error: reference to 'prev' is ambiguous
                 prev[i][j] = prev[prev[i][j-1]][j-1];
                              ^
0_0_16213387_3000.cpp:37:5: note: candidates are: int prev [100010][22]
 int prev[100010][22];
     ^
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_16213387_3000.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:193:5: note:                 template<class _BidirectionalIterator> _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type)
     prev(_BidirectionalIterator __x, typename
     ^
0_0_16213387_3000.cpp:76:35: error: reference to 'prev' is ambiguous
                 prev[i][j] = prev[prev[i][j-1]][j-1];
                                   ^
0_0_16213387_3000.cpp:37:5: note: candidates are: int prev [100010][22]
 int prev[100010][22];
     ^
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_16213387_3000.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:193:5: note:                 template<class _BidirectionalIterator> _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type)
     prev(_BidirectionalIterator __x, typename
     ^
0_0_16213387_3000.cpp:94:25: error: reference to 'prev' is ambiguous
                 if (mdk[prev[now][j]].s>=q[i].s)
                         ^
0_0_16213387_3000.cpp:37:5: note: candidates are: int prev [100010][22]
 int prev[100010][22];
     ^
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_16213387_3000.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:193:5: note:                 template<class _BidirectionalIterator> _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type)
     prev(_BidirectionalIterator __x, typename
     ^
0_0_16213387_3000.cpp:97:27: error: reference to 'prev' is ambiguous
                     now = prev[now][j];
                           ^
0_0_16213387_3000.cpp:37:5: note: candidates are: int prev [100010][22]
 int prev[100010][22];
     ^
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_16213387_3000.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:193:5: note:                 template<class _BidirectionalIterator> _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type)
     prev(_BidirectionalIterator __x, typename
     ^


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