【LeetCode】83. Remove Duplicates from Sorted List

问题描述

Given a sorted linked list, delete all duplicates such that each element appear only once.

For example,
Given 1->1->2, return 1->2.
Given 1->1->2->3->3, return 1->2->3.

代码

class Solution {
public:
    ListNode* deleteDuplicates(ListNode* head) {
        if(head==0) return head;
        ListNode* p = head;
        ListNode* q = p->next;
        while(q) {
        	if(p->val == q->val) {
	        	p->next = q->next;
	        	q = p->next;
	        } else {
        		p = q;
        		q = q->next;
        	}
        }
        return head;
    }
};