@[xczsxczs](/user/1033548) 一眼丁真，鉴定为在 `stack` 为空时弹出堆顶 by heyx0201 @ 2023-12-01 20:21:04
@[heyx0201](/user/768951) 谢谢 by xczsxczs @ 2023-12-02 15:11:12