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std::list<int> l(5,8);
std::list<int>::iterator it = l.begin();
std::advance(it, 4);
l.erase(it);
CACHE_LST cache_list_;
cache_list_.push_back(1);
cache_list_.push_back(2);
cache_list_.push_back(3);
cache_list_.push_back(4);
CACHE_LST::iterator it = cache_list_.begin();
cache_list_.erase(++it);