203. 移除链表元素(Easy)

Python示例

class Solution:
    def removeElements(self, head: ListNode, val: int) -> ListNode:
        dummpyHead = ListNode(None)
        dummpyHead.next = head 

        p = dummpyHead
        while p and p.next:
            if p.next.val == val:
                p.next = p.next.next 
            else:
                p = p.next 
        return dummpyHead.next