[leetcode-83]Remove Duplicates from Sorted List（C）

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.

代码如下：4ms

[code]struct ListNode* deleteDuplicates(struct ListNode* head) {
    if(!head)
        return head;

    struct ListNode *prev = head;
    struct ListNode *current = head->next;

    while(current){
        if(prev->val==current->val)
            prev->next = current->next;
        else
            prev = current;

        current = current->next;
    }
    return head;
}