https://leetcode.com/problems/reverse-linked-list-ii/solutions/7494415/leetcode-92-reverse-linked-list-ii-simpl-7ovq
https://leetcode.com/problems/remove-duplicates-from-sorted-list-ii/solutions/7494419/leetcode-82-remove-duplicates-from-sorte-f0qt
https://leetcode.com/problems/insertion-sort-list/solutions/7493328/leetcode-147-insertion-sort-list-simple-exb7g
https://leetcode.com/problems/count-negative-numbers-in-a-sorted-matrix/solutions/7446109/leetcode-1351-counting-negative-numbers-omgnq
