0_0_37754565_1545.cpp: In function 'void sol()':
0_0_37754565_1545.cpp:66:27: error: could not convert 'chk.std::function<_Res(_ArgTypes ...)>::operator()<void, {int, int, int}>(mid, x, y)' from 'void' to 'bool'
if(chk(mid,x,y)) {
^
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_37754565_1545.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 = __gnu_cxx::__normal_iterator<std::array<int, 3ull>*, std::vector<std::array<int, 3ull> > >; _Iterator2 = __gnu_cxx::__normal_iterator<std::array<int, 3ull>*, std::vector<std::array<int, 3ull> > >; _Compare = sol()::<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 = __gnu_cxx::__normal_iterator<std::array<int, 3ull>*, std::vector<std::array<int, 3ull> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<sol()::<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 = __gnu_cxx::__normal_iterator<std::array<int, 3ull>*, std::vector<std::array<int, 3ull> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<sol()::<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 = __gnu_cxx::__normal_iterator<std::array<int, 3ull>*, std::vector<std::array<int, 3ull> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<sol()::<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 = __gnu_cxx::__normal_iterator<std::array<int, 3ull>*, std::vector<std::array<int, 3ull> > >; _Compare = sol()::<lambda(auto:1&, auto:2&)>]'
0_0_37754565_1545.cpp:23:6: 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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