83. [E] Remove Duplicates from Sorted List

https://leetcode.com/problems/remove-duplicates-from-sorted-list/

无他，遍历过去就是

class Solution {
    public ListNode deleteDuplicates(ListNode head) {
        if (head == null || head.next == null) {
            return head;
        }
        
        ListNode p = head;
        while (p != null && p.next != null) {
            if (p.val == p.next.val) {
                p.next = p.next.next;
            } else {
                p = p.next;   
            }
        }
        
        return head;
    }
}