Remove Duplicates from Sorted List

lcpy gen -n 83   # by problem number
lcpy gen -s remove_duplicates_from_sorted_list   # by problem name

Input: head = [1,1,2]
Output: [1,2]

Input: head = [1,1,2,3,3]
Output: [1,2,3]

from leetcode_py import ListNode


class Solution:
    # Time: O(n)
    # Space: O(1)
    def delete_duplicates(self, head: ListNode[int] | None) -> ListNode[int] | None:
        current = head
        while current and current.next:
            if current.val == current.next.val:
                current.next = current.next.next
            else:
                current = current.next
        return head