Leetcode 83. 删除排序链表中的重复元素

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

/**
 * Definition for singly-linked list.
 * struct ListNode {
 *     int val;
 *     struct ListNode *next;
 * };
 */


struct ListNode* deleteDuplicates(struct ListNode* head){
    if(!head) {
        return head;
    }
    struct ListNode* cur = head;
    while(cur->next) {
        if(cur->val == cur->next->val) {
            cur->next = cur->next->next;
        }else {
            cur = cur->next;
        }
    }
    return head;
}

/**
 * Definition for singly-linked list.
 * public class ListNode {
 *     int val;
 *     ListNode next;
 *     ListNode() {}
 *     ListNode(int val) { this.val = val; }
 *     ListNode(int val, ListNode next) { this.val = val; this.next = next; }
 * }
 */
class Solution {
    public ListNode deleteDuplicates(ListNode head) {
        if(head == null) {
            return head;
        }
        ListNode cur = head;
        while(cur.next != null) {
            if(cur.val == cur.next.val){
                cur.next = cur.next.next;
            }else {
                cur = cur.next;
            }
        }
        return head;
    }
}