题解 | #删除有序链表中重复的元素-I#

/**
 * struct ListNode {
 *	int val;
 *	struct ListNode *next;
 * };
 */
/**
 * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
 *
 * 
 * @param head ListNode类 
 * @return ListNode类
 */
#include <stdarg.h>
struct ListNode* deleteDuplicates(struct ListNode* head ) {
    // write code here
    struct ListNode* cur;
    struct ListNode* pre;
    if(head==NULL||head->next==NULL)
    return head;
    pre=head;
    cur=head->next;
    while(cur!=NULL)
    {
        if(pre->val!=pre->next->val)
        { 
            pre=pre->next;
            cur=pre->next;
        }
        else {
        pre->next=cur->next;
        cur=pre->next;
        }
    }
    return head;
}