template < typename T >
auto Find(const T& value, std::_List_iterator<T> first, std::_List_iterator<T> last) {
    while (!(*first == value) && first != last) {
        first++;
    }
    return first;
}

template < typename T, typename RIterator >
RIterator Binary(const T& value, RIterator first, RIterator last) {
    if(first == last) return first;
    RIterator mid = first + (last - first) / 2;
    
    if(*mid < value) return Binary(value, mid + 1, last);
    else return Binary(value, first, mid);
}

template < typename T, typename Iterator >
Iterator Find(const T& value, Iterator first, Iterator last) {
    Iterator res = Binary(value, first, last);
    if (!(*res == value)) return last;
    return first;
    
}