Tag: Dummy Node

为什么要使用哑节点？ English: Using a dummy node is a common technique in linked list problems. It involves creating an extra node that is placed before the head of the linked list. Chinese: 使用哑节点是链表问题中常见的技巧。它涉及在链表头节点之前创建一个额外的节点。 English: This dummy node doesn’t hold any useful data for the problem but serves as a useful placeholder…