You are given an integer array answers where each element represents a rabbit’s response to the question: how many other rabbits in the forest have the same color as you. Specifically, if answers[i] = k, then that rabbit claims there are exactly $k$ other rabbits with its color.

Assuming every rabbit in answers answered truthfully, return the minimum possible total number of rabbits that could be in the forest, including rabbits that did not provide an answer.

Note: Rabbits that share the same color must have answers that are mutually consistent with the size of their color group.

Constraints:

• $1 \leq$ answers.length $\leq 1000$

• $0 \leq$ answers[i] $< 1000$

Input: answers = [0,0,0,0,0]-List[int]
Output: 5-int
Explanation: A rabbit answering 0 means no other rabbit shares its color, so each such rabbit forms a unique color group of size 1. With 5 rabbits answering 0, the minimum total is 5.

Input: answers = [2,2,2,2,2]-List[int]
Output: 6-int
Explanation: An answer of 2 implies a color group of size 2 + 1 = 3. The 5 rabbits claiming 2 form one full group of 3, and the remaining 2 must belong to another group of size 3 (requiring 1 additional unseen rabbit), for a total of 3 + 3 = 6.

Input: answers = [3,3,3,1,1,1,1,0,0]-List[int]
Output: 10-int
Explanation: For answer 3 the group size is 4, and the three rabbits need one group of 4 (contributing 4); for answer 1 the group size is 2, and the four rabbits form exactly two groups (contributing 4); for answer 0 the group size is 1, and the two rabbits contribute 2. The minimum total is 4 + 4 + 2 = 10.

Input: answers = [999]-List[int]
Output: 1000-int
Explanation: An answer of 999 implies a color group of size 1000. Even though only one rabbit answered, the minimum consistent total requires the full group of 1000 rabbits.

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