19/04/28 17:02:57.34 UbqPSgHc.net
>>426
using iterator = typename std;;vector<int>::iterator;
using const_iterator = typename std;;vector<int>::const_iterator;
using my_iterator = MYIterator;
my_iterator begin();
iterator end();
const my_iterator begin() const;
const_iterator end() const;
const my_iterator cbegin() const;
const_iterator cend() const;