leetcode 之Remove Duplicates from Sorted List（16）

ListNode *deleteDuplicates(ListNode *head)
      {

          if (head == nullptr)
              return nullptr;
          ListNode *prev = head;
          for (ListNode *cur = head->next; cur != nullptr; cur = cur->next)
          {
              if (cur->val == prev->val)
              {
                  prev->next = cur->next;
                  
                  delete cur;
              }
              else
                  prev->next = cur;
          }
      }