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View Compilation Error

0_0_37762195_22274.cpp: In function 'bool check(int, int, int)':
0_0_37762195_22274.cpp:41:10: error: expected unqualified-id before '[' token
     auto [x2, y2, w] = a[md];
          ^
0_0_37762195_22274.cpp:43:17: error: 'w' was not declared in this scope
     return d >= w;
                 ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:71:0,
                 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++/istream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/sstream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/complex:45,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ccomplex:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_37762195_22274.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/predefined_ops.h: In instantiation of 'bool __gnu_cxx::__ops::_Iter_comp_iter<_Compare>::operator()(_Iterator1, _Iterator2) [with _Iterator1 = std::array<int, 3ull>*; _Iterator2 = std::array<int, 3ull>*; _Compare = solve()::<lambda(auto:1&, auto:2&)>]':
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:1846:27:   required from 'void std::__insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = std::array<int, 3ull>*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<solve()::<lambda(auto:1&, auto:2&)> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:1884:70:   required from 'void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = std::array<int, 3ull>*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<solve()::<lambda(auto:1&, auto:2&)> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:1970:55:   required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = std::array<int, 3ull>*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<solve()::<lambda(auto:1&, auto:2&)> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:4716:78:   required from 'void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = std::array<int, 3ull>*; _Compare = solve()::<lambda(auto:1&, auto:2&)>]'
0_0_37762195_22274.cpp:49:6:   required from here
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/predefined_ops.h:121:46: error: invalid use of 'auto'
         { return bool(_M_comp(*__it1, *__it2)); }
                                              ^


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