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Remove Duplicates from Sorted List
Remove Duplicates from Sorted List
Given a sorted linked list, delete all duplicates such that each element appear only once.
For example,
Given 1->1->2, return 1->2.
Given 1->1->2->3->3, return 1->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 first;15 ListNode second;16 if(null == head)17 return null;18 first = head;19 second = head.next;20 while(second != null){21 while(null != second && first.val == second.val){22 first.next = second.next;23 second = first.next;24 }25 first = first.next;26 if(null != second)27 second = second.next;28 }29 return head;30 }31 }
Remove Duplicates from Sorted List
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