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/**
* Definition for singly-linked list.
* public class ListNode {
* int val;
* ListNode next;
* ListNode(int x) { val = x; }
* }
*/
class Solution {
public ListNode deleteDuplicates(ListNode head) {
ListNode curNode = head;
while(null != curNode && null != curNode.next) {
ListNode nextNode = curNode.next;
while(curNode.val == nextNode.val) {
curNode.next = nextNode.next;
nextNode = curNode.next;
if(null == nextNode) break;
}
curNode = nextNode;
}
return head;
}
}