18.2 删除链表中重复的结点

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题目描述

![img](https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/17e301df-52e8-4886-b593-841a16d13e44.png" width="450)

解题描述

public ListNode deleteDuplication(ListNode pHead) {
    if (pHead == null || pHead.next == null)
        return pHead;
    ListNode next = pHead.next;
    if (pHead.val == next.val) {
        while (next != null && pHead.val == next.val)
            next = next.next;
        return deleteDuplication(next);
    } else {
        pHead.next = deleteDuplication(pHead.next);
        return pHead;
    }
}