Given a String [] arr, print a pair of items together in one line until all the pairs are printed. A pair is a element and the element next to it. Print each item with a comma in between them. Scanner input = new Scanner(System.in);         String[] arr = new String[8];         for (int i=0;i<8;i++){             arr[i] = input.nextLine();         } Input:   [apple, banana, kiwi, grape, milk, soda, juice, coffee]  Output:   apple, banana   banana, kiwi   kiwi, grape   grape, milk   milk, soda   soda, juice   juice, coffee

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Polynomial Time

The problems for which the deterministic polynomial-time algorithm exists belong to the complexity class (p) and it is central in the field of computational complexity theory. According to Cobham’s thesis, polynomial time is a synonym for “feasible”, “fast”, and “efficient”.