[LeetCode] Remove Linked List Elements

Remove all elements from a linked list of integers that have value val.

 

Example:

Input: 1->2->6->3->4->5->6, val = 6 Output: 1->2->3->4->5

 

Solution

1. 사실 아직 잘 이해가 가지않는다. LinkedList를 공부하고 다시풀어보자.

#(3) Remove Linked List Elements

# Definition for singly-linked list.
class ListNode:
    def __init__(self, val=0, next=None):
        self.val = val
        self.next = next
class Solution:
    def removeElements(self, head: ListNode, val: int) -> ListNode:
        dummy = ListNode(0)
        dummy.next = head
        node = dummy
        while node.next:
            if node.next.val == val:
                node.next = node.next.next
            else:
                node = node.next
        return dummy.next