In the card game “No Thanks,” the deck of cards consists of 36 cards numbered 1–36, and players collect cards to their score pile as the game is played. A player’s final score is the sum of the numbers on their collected cards, with one exception: if a player has collected any cards with two or more consecutive numbers, only the smallest number of that group counts toward the score. Your job is to compute the score for a single player’s pile of cards, though here we allow play with
a deck much larger than 36 cards.
输入描述:
The first line contains one integer, n , representing the number of cards collected. The second line contains n integers representing the numbers on the collected cards. You may assume that 1 ≤ n ≤ 90 000, all card values are in the range 1 . . . 90 000 inclusive, and no card value is
repeated.
输出描述:
Output a single line containing the score for the given set of cards.