how to remove element from unordered set code example
Example: remove from unordered_set c++
// By position: iterator erase ( const_iterator position );
// By key: size_type erase ( const key_type& k );
// By range: iterator erase ( const_iterator first, const_iterator last );
myset.erase ( myset.begin() ); // erasing by iterator
myset.erase ( "France" ); // erasing by key
myset.erase ( myset.find("Japan"), myset.end() ); // erasing by range