【模板】树的直径

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	C23panweiming	35ms	408 KiB	C++11(O2)	531 Bytes	2025-1-14 20:02:49
AC	C23huangyuran	38ms	420 KiB	C++14(O2)	495 Bytes	2025-1-14 20:28:45
AC	C23liupeilin	38ms	404 KiB	C++14(O2)	713 Bytes	2025-7-6 19:12:45
AC	C22zhouzijie	39ms	404 KiB	C++11	702 Bytes	2025-1-18 16:24:29
AC	C23zhuanghaojun	39ms	408 KiB	C++11	641 Bytes	2025-1-14 19:52:26
AC	C24wangzihan	39ms	408 KiB	C++11	631 Bytes	2025-1-16 13:29:28
AC	zengfj	39ms	404 KiB	C++11(O2)	773 Bytes	2025-1-8 21:35:24
AC	C23lvzekai	40ms	448 KiB	C++11	623 Bytes	2025-1-14 19:48:36
AC	C24zhuchengyu	40ms	1.3 MiB	C++11	618 Bytes	2025-1-14 19:52:39
AC	C23pengweixuan	49ms	788 KiB	C++11	1.1 KiB	2025-7-6 19:29:01
AC	C23liwenyu	59ms	1.8 MiB	C++11	505 Bytes	2025-7-6 20:24:09
AC	C23caimingfeng	130ms	2.8 MiB	C++11	602 Bytes	2025-7-6 19:42:50
AC	C23huangminzhe	141ms	2.7 MiB	C++17	598 Bytes	2025-1-14 20:06:29
AC	C23yanzizheng	263ms	23.3 MiB	C++11(O2)	1.5 KiB	2025-1-14 20:08:19