In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/set:60:0,
from 0_0_15301061_29033.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_tree.h: In instantiation of 'std::pair<std::_Rb_tree_node_base*, std::_Rb_tree_node_base*> std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_get_insert_unique_pos(const key_type&) [with _Key = std::pair<long long int, long long int>; _Val = std::pair<long long int, long long int>; _KeyOfValue = std::_Identity<std::pair<long long int, long long int> >; _Compare = int; _Alloc = std::allocator<std::pair<long long int, long long int> >; std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::key_type = std::pair<long long int, long long int>]':
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_tree.h:1498:47: required from 'std::pair<std::_Rb_tree_iterator<_Val>, bool> std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_insert_unique(_Arg&&) [with _Arg = const std::pair<long long int, long long int>&; _Key = std::pair<long long int, long long int>; _Val = std::pair<long long int, long long int>; _KeyOfValue = std::_Identity<std::pair<long long int, long long int> >; _Compare = int; _Alloc = std::allocator<std::pair<long long int, long long int> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_set.h:502:29: required from 'std::pair<typename std::_Rb_tree<_Key, _Key, std::_Identity<_Key>, _Compare, typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<_Key>::other>::const_iterator, bool> std::set<_Key, _Compare, _Alloc>::insert(const value_type&) [with _Key = std::pair<long long int, long long int>; _Compare = int; _Alloc = std::allocator<std::pair<long long int, long long int> >; typename std::_Rb_tree<_Key, _Key, std::_Identity<_Key>, _Compare, typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<_Key>::other>::const_iterator = std::_Rb_tree_const_iterator<std::pair<long long int, long long int> >; std::set<_Key, _Compare, _Alloc>::value_type = std::pair<long long int, long long int>]'
0_0_15301061_29033.cpp:50:40: required from here
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_tree.h:1445:11: error: expression cannot be used as a function
__comp = _M_impl._M_key_compare(__k, _S_key(__x));
^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_tree.h:1456:7: error: expression cannot be used as a function
if (_M_impl._M_key_compare(_S_key(__j._M_node), __k))
^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_tree.h: In instantiation of 'std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::iterator std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_insert_(std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_Base_ptr, std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_Base_ptr, _Arg&&) [with _Arg = const std::pair<long long int, long long int>&; _Key = std::pair<long long int, long long int>; _Val = std::pair<long long int, long long int>; _KeyOfValue = std::_Identity<std::pair<long long int, long long int> >; _Compare = int; _Alloc = std::allocator<std::pair<long long int, long long int> >; std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::iterator = std::_Rb_tree_iterator<std::pair<long long int, long long int> >; std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_Base_ptr = std::_Rb_tree_node_base*]':
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_tree.h:1502:38: required from 'std::pair<std::_Rb_tree_iterator<_Val>, bool> std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_insert_unique(_Arg&&) [with _Arg = const std::pair<long long int, long long int>&; _Key = std::pair<long long int, long long int>; _Val = std::pair<long long int, long long int>; _KeyOfValue = std::_Identity<std::pair<long long int, long long int> >; _Compare = int; _Alloc = std::allocator<std::pair<long long int, long long int> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_set.h:502:29: required from 'std::pair<typename std::_Rb_tree<_Key, _Key, std::_Identity<_Key>, _Compare, typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<_Key>::other>::const_iterator, bool> std::set<_Key, _Compare, _Alloc>::insert(const value_type&) [with _Key = std::pair<long long int, long long int>; _Compare = int; _Alloc = std::allocator<std::pair<long long int, long long int> >; typename std::_Rb_tree<_Key, _Key, std::_Identity<_Key>, _Compare, typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<_Key>::other>::const_iterator = std::_Rb_tree_const_iterator<std::pair<long long int, long long int> >; std::set<_Key, _Compare, _Alloc>::value_type = std::pair<long long int, long long int>]'
0_0_15301061_29033.cpp:50:40: required from here
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_tree.h:1140:8: error: expression cannot be used as a function
|| _M_impl._M_key_compare(_KeyOfValue()(__v),
^
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