LeetCode - Algorithms - 83. Remove Duplicates from Sorted List

Problem

83. Remove Duplicates from Sorted List

Java

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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 head;
        ListNode node = head;
        while(node!=null) {
            if (node.next!=null && node.next.val==node.val) {
                ListNode obsoleteNode = node.next;
                node.next = node.next.next;
                obsoleteNode = null;
            }
            else
                node = node.next;
        }
        return head;
    }
}

Submission Detail

  • 165 / 165 test cases passed.
  • Runtime: 0 ms, faster than 100.00% of Java online submissions for Remove Duplicates from Sorted List.
  • Memory Usage: 38.4 MB, less than 10.24% of Java online submissions for Remove Duplicates from Sorted List.