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/**
* Definition for singly-linked list.
* struct ListNode {
* int val;
* ListNode *next;
* ListNode() : val(0), next(nullptr) {}
* ListNode(int x) : val(x), next(nullptr) {}
* ListNode(int x, ListNode *next) : val(x), next(next) {}
* };
*/
class Solution {
public:
ListNode* deleteDuplicates(ListNode* head) {
if(head==NULL)
{
return head;
}
ListNode *curr = head;
while(curr->next != NULL)
{
if(curr->val == curr->next->val)
{
curr->next = curr->next->next;
}
else
{
curr = curr->next;
}
}
return head;
}
};
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