0_0_12106541_4772.cpp: In function `int main()':
0_0_12106541_4772.cpp:131: error: could not convert `((*&it) <unknown operator> ((const std::_Rb_tree_iterator<std::pair<const std::pair<int, int>, int> >&)((const std::_Rb_tree_iterator<std::pair<const std::pair<int, int>, int> >*)(&(&coll)->std::map<_Key, _Tp, _Compare, _Alloc>::end [with _Key = std::pair<int, int>, _Tp = int, _Compare = std::less<std::pair<int, int> >, _Alloc = std::allocator<std::pair<const std::pair<int, int>, int> >]()))))' to `bool'
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