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RemoveDuplicatesfromSortedList.java

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/**

* Created by YGZ on 2016/3/22.

*/

public class RemoveDuplicatesfromSortedList {

public ListNode deleteDuplicates(ListNode head) {

if (head==null||head.next==null) return head;

ListNode node1,node2;

node1 = head;

node2 = head.next;

while(node2.next!=null){

if (node1.val==node2.val){

node1.next = node2.next;

node2 = node1.next;

}else{

node1 = node2;

node2 = node1.next;

}

}

if (node1.val==node2.val){

node1.next = null;

}

return head;

}

}