In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:48:0,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
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_36958445_20760.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_function.h: In instantiation of 'bool std::less<_Tp>::operator()(const _Tp&, const _Tp&) const [with _Tp = node]':
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/predefined_ops.h:141:37: required from 'bool __gnu_cxx::__ops::_Iter_comp_val<_Compare>::operator()(_Iterator, _Value&) [with _Iterator = __gnu_cxx::__normal_iterator<node*, std::vector<node, std::allocator<node> > >; _Value = node; _Compare = std::less<node>]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_heap.h:129:76: required from 'void std::__push_heap(_RandomAccessIterator, _Distance, _Distance, _Tp, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<node*, std::vector<node, std::allocator<node> > >; _Distance = long long int; _Tp = node; _Compare = __gnu_cxx::__ops::_Iter_comp_val<std::less<node> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_heap.h:201:51: required from 'void std::push_heap(_RAIter, _RAIter, _Compare) [with _RAIter = __gnu_cxx::__normal_iterator<node*, std::vector<node, std::allocator<node> > >; _Compare = std::less<node>]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_queue.h:510:41: required from 'void std::priority_queue<_Tp, _Sequence, _Compare>::push(std::priority_queue<_Tp, _Sequence, _Compare>::value_type&&) [with _Tp = node; _Sequence = std::vector<node, std::allocator<node> >; _Compare = std::less<node>; std::priority_queue<_Tp, _Sequence, _Compare>::value_type = node]'
0_0_36958445_20760.cpp:32:19: required from here
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_function.h:371:20: error: passing 'const node' as 'this' argument of 'bool node::operator<(node)' discards qualifiers [-fpermissive]
{ return __x < __y; }
^
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