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GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/bits/stl_algo.h: In function `_ForwardIterator std::lower_bound(_ForwardIterator, _ForwardIterator, const _Tp&, _Compare) [with _ForwardIterator = std::_Rb_tree_iterator<std::pair<const node, int> >, _Tp = int, _Compare = CMP]':
0_0_3987771_27707.cpp:61:   instantiated from here
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/bits/stl_algo.h:2687: error: no match for call to `(CMP) (std::pair<const node, int>&, const int&)'
0_0_3987771_27707.cpp:33: note: candidates are: bool CMP::operator()(const node&, const int&)