Leetcode Question Number 989

[ghost]

Leetcode Question Number 989 soultion needs to be added in the repo . The link for the question is this. Accepted Languages C++ / JAVA . You Only need to add the class Solution in the file. Make Sure you have read the contributions guidelines before creating an PR.

[suraj-singh12]

@amanv8060 I would like to work on this issue. Could you please assign it to me.