A storeroom is used to organize items stored in it on N shelves. Shelves are numbered from $0$ TO N$-1.$ The K$-$th shelf is dedicated to items of only one type, denoted by a positive integerA$[$K$].$

Recently it ws decided that it is necesary to free R consecutive shelves. Shelves cannot be reordered. what is the maximum number of types of items which still can be stored in the storeroo after freeing R consecutive shelves?

class solution $\{$public int solution$($int$[]$ A$,$ int R;$\}$