Use one of our three array-based list implementations (unsorted, sorted or index

Question

Use one of our three array-based list implementations (unsorted, sorted or indexed) to support an application that does the following:

a) Allows a user to enter a list of the countries he or she has visited and then displays the list in alphabetical order, plus a count of how many countries are on the list. If the user mistakenly enters the same country twice, the program should include it on the list only once.

c) Allows a user to enter a sequence of product information -- namely, a product's description and cost. After the information is entered, the user can repeatedly enter a price range, and it displays all of the products in that price range, ordered from the cheapest to the most expensive.

Explanation / Answer

in this code you will get the name of the countries but if you want to remove the duplicacy you need to add the code like

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