二叉树后序遍历的首节点与后继

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	AHU大肥鸭	527ms	36.1 MiB	C++20(O2)	681 Bytes	2025-10-7 23:08:09
AC	CYMario	532ms	35.6 MiB	C++20(O2)	506 Bytes	2025-10-5 22:02:15
AC	ECUST小瘦猪	551ms	35.6 MiB	C++20(O2)	831 Bytes	2025-10-8 19:49:38
AC	qianfu	639ms	44.1 MiB	C++20(O2)	476 Bytes	2025-10-14 20:57:53
AC	plosa	660ms	44.2 MiB	C++20(O2)	619 Bytes	2025-10-23 20:41:02
AC	csbendan	665ms	44.1 MiB	C++20(O2)	745 Bytes	2025-11-23 16:55:13
AC	Abcd1234	749ms	45 MiB	C++20(O2)	1.6 KiB	2025-10-22 20:42:22