[Link] https://leetcode.com/problems/remove-duplicates-from-sorted-list/
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/**
* Definition for singly-linked list.
* public class ListNode {
* int val;
* ListNode next;
* ListNode() {}
* ListNode(int val) { this.val = val; }
* ListNode(int val, ListNode next) { this.val = val; this.next = next; }
* }
*/
class Solution {
public ListNode deleteDuplicates(ListNode head) {
if(head == null) return null;
ListNode node = head, tmpNode = head.next;
int val = head.val;
while(tmpNode != null) {
if(val != tmpNode.val) {
node.next = tmpNode;
node = node.next;
val = tmpNode.val;
}
else tmpNode = tmpNode.next;
}
node.next = null;
return head;
}
}