Fill-in-the-Blank and 19, There are two types of container classes in the STL: 20. A(n) , 21. A container container organizes data in a sequential fashion similar to an array. class is not itself a container, but a class that adapts a container to a specific use. 22. A(n) 1) , container stores its data in a nonsequential way that makes it faster to locate elements. 23. _ are pointer-like objects used to access data stored in a container. and a Each element that is stored in a map has two parts: a 25. 26. The 27. The is a map container that allows duplicate keys. class is an associative container that stores a collection of unique sorted values. usefaheader file defines several function templates that implement