【例】树的直径

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	DH-LZR	154ms	8.4 MiB	C++14(O2)	687 Bytes	2025-8-8 10:10:21
AC	坤坤	178ms	6.7 MiB	C++14(O2)	817 Bytes	2026-2-5 11:41:30
AC	方一帆2	183ms	5.1 MiB	C++14(O2)	923 Bytes	2025-11-10 18:56:29
AC	程裕澍	199ms	8.6 MiB	C++14(O2)	514 Bytes	2025-11-16 13:48:22
AC	jike1994	232ms	8.3 MiB	C++14(O2)	858 Bytes	2026-1-28 10:13:36
AC	白骏锋	245ms	17.6 MiB	C++14(O2)	630 Bytes	2025-12-7 10:50:28
AC	lizi12	247ms	17.6 MiB	C++17(O2)	606 Bytes	2025-12-6 10:16:33
AC	lsd	272ms	6.6 MiB	C++14(O2)	877 Bytes	2025-12-13 11:31:31