template<class RandomAccessIterator>
void push_heap(RandomAccessIterator first, RandomAccessIterator last);
template<class RandomAccessIterator, class Compare>
void push_heap(RandomAccessIterator first, RandomAccessIterator last,
Compare comp);
Effects: Places the value in the location last - 1 into the resulting heap [first,last).
Requires: The range [first,last - 1) shall be a valid heap. The type of *first shall satisfy the MoveConstructible requirements (Table [moveconstructible]) and the MoveAssignable requirements (Table [moveassignable]).
Complexity: At most log(last - first) comparisons.