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Remove Duplicates from Sorted List II
Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list.
For example,
Given 1->2->3->3->4->4->5, return 1->2->5.
Given 1->1->1->2->3, return 2->3.
1 /** 2 * Definition for singly-linked list. 3 * public class ListNode { 4 * int val; 5 * ListNode next; 6 * ListNode(int x) { 7 * val = x; 8 * next = null; 9 * }10 * }11 */12 public class Solution {13 public ListNode deleteDuplicates(ListNode head) {14 ListNode header = new ListNode(Integer.MAX_VALUE);15 header.next = head;16 ListNode cur = header, pre = header.next;17 header.next = null;18 while(pre != null){19 ListNode tmp = pre;20 while(pre != null && pre.val == tmp.val) pre = pre.next;21 if(tmp.next == pre){22 cur.next = tmp;23 cur = cur.next;24 cur.next = null;25 }26 }27 return header.next;28 }29 }
Remove Duplicates from Sorted List II
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