17.剑指Offer-删除链表中重复的结点

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题目描述

解题描述

public class ListNode {
    int val;
    ListNode next = null;

    ListNode(int val) {
        this.val = val;
    }
}

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;
    }
}