链表·链表 模式

识别信号

• Do you know how to handle pointer updates safely without losing references to nodes?
• Can you explain the difference in space complexity between the iterative and recursive solutions?

解题流程

1. 1. 明确窗口/状态定义
2. 2. 更新状态并维护约束
3. 3. 用边界样例验证

常见失分点

• Failing to maintain the correct order of nodes during pointer reversal, leading to lost references.