An escape game requires that players solve various puzzles to obtain objects that will aid them in escaping. In one such puzzle, players are given an array of integers and a set of rules to follow in order. Here are the instructions given to the player " given an array of integer values, maximize the points earned using the following method: a. Choose a value v delete all elements of that value and add their sum to the points.
b. Delete all elements equal to v+1 or v-1 for no points.
c. Repeat steps 1 and 2 until there are no more elements in the array.

Required:
Calculate the maximum number of points that can be achieved by following the above rules for an array of the values.