末尾追加与倒数查询

状态	递交者	时间	内存	语言	代码	递交时间
AC	Teacher_chen	20ms	552 KiB	C++14	246 Bytes	2026-9-12 20:28:57
AC	yinyuanqi	21ms	536 KiB	C++14	310 Bytes	2026-10-3 9:51:02
AC	chenyuanxiu	21ms	556 KiB	C++14	336 Bytes	2026-10-3 9:58:28
AC	zhanggaochang	21ms	556 KiB	C++14	233 Bytes	2026-9-27 15:35:20
AC	xizixiang	21ms	540 KiB	C++14	423 Bytes	2026-9-27 15:38:06
AC	xizijia	21ms	536 KiB	C++14	376 Bytes	2026-9-27 15:32:31
AC	qinjunxian	23ms	552 KiB	C++14	248 Bytes	2026-9-12 20:47:15