leetcode 83 Remove Duplicates from Sorted List C++

这题没什么说的，注意以下节点的销毁。

class Solution {public:    ListNode* deleteDuplicates(ListNode* head) {        ListNode* tmp = head;        while(head){            if (head->next == NULL) break;            if(head->val == head->next->val){                ListNode * p = head->next;                head->next = head->next->next;                delete p;            }else{                head = head->next;            }        }        return tmp;    }};