83.remove-duplicates-from-sorted-list.cpp

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