83 LeetCode Java: Remove Duplicates from Sorted List – Easy
Problem:
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.
Thoughts:
Using fakeHead to make list manipulation easier.
Solutions:
/**
* Definition for singly-linked list.
* public class ListNode {
* int val;
* ListNode next;
* ListNode(int x) { val = x; }
* }
*/
public class Solution {
public ListNode deleteDuplicates(ListNode head) {
if (head == null || head.next == null) {
return head;
}
ListNode p = head;
while (p.next != null) {
if (p.val == p.next.val) {
p.next = p.next.next;
}
else {
p = p.next;
}
}
return head;
}
}