LeetCode 420. Strong Password checker

Thoughts for [Case.3]
1. Delete first in [3+Row]s with minimizing [BR] case after Deleting in [3+Rows]
2. Don’t Delete all thing in one [3+Row] case to avoid to update [LUD] status.
3. You can delete from every position.
so Don’t try to delete from the start position and Don’t consider the position of [3+Rows] .

It was not easy for me because I didn’t a coding recently. and It took a long time to solve this problem. Anyway, All code and solutions were made by myself. I didn’t refer any others. I will upload a code after optimizing. (maybe 🙂 )