I need help in java please! Thanks in advanced.

Write a function: class Solution ( public int solution(int[] A) that, given a non-empty zero-indexed array A consisting of N integers, returns the length of the list constructed from A in the above manner. For example, given array A such that: A[2] 1 A[3]3 the function should return 4, as explained in the example above Assume that: N is an integer within the range [1..200,000]; .each element of array A is an integer within the range [-1..N-1]; it will always be possible to construct the list and its length will be finite. In your solution, focus on correctness. The performance of your solution will not be the focus of the assessment