83. remove-duplicated-from-sorted

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

• head.val 과 head.next.val 을 비교해서 같으면 head.next.next를 head.next에 연결해준다.

Runtime: 0 ms, faster than 100.00% of Java online submissions for Remove Duplicates from Sorted List.
Memory Usage: 36.2 MB, less than 100.00% of Java online submissions for Remove Duplicates from Sorted List.

class Solution {
    public ListNode deleteDuplicates(ListNode head) {
        ListNode mockHead = new ListNode(-1);
        mockHead.next = head;

        while(head != null && head.next != null){
            if(head.val == head.next.val){
                head.next = head.next.next;
                continue;
            }
            head = head.next;
        }

        return mockHead.next;
        
    }
}