操作历史管理器的撤销/重做能力(100分)

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	f5RjrkUt2n	21ms	7 MiB	C++14(O2)	846 Bytes	2026-5-1 16:59:31
AC	5xB1pXsrsy	22ms	6.9 MiB	C++	1.5 KiB	2026-5-16 10:08:21
AC	NJd6HdgWww	22ms	6.8 MiB	C++14(O2)	1.2 KiB	2026-5-2 22:50:28
AC	Ethan_L	22ms	6.7 MiB	C++14(O2)	1.1 KiB	2026-6-13 12:34:46
AC	y7gCUL6k91	22ms	7.1 MiB	C++14(O2)	1.1 KiB	2026-5-12 16:52:47
AC	rcMhEVLxUw	23ms	7 MiB	C++14(O2)	2.7 KiB	2026-5-2 18:43:19
AC	GZCxxEwLSt	23ms	6.7 MiB	C++14(O2)	1.7 KiB	2026-6-4 22:35:17
AC	飞鱼非鱼	23ms	6.7 MiB	C++14(O2)	1.2 KiB	2026-6-9 23:19:37
AC	44Q22wzFav	23ms	7 MiB	C++	1.1 KiB	2026-6-20 20:05:10
AC	FlcYoJt5rr	24ms	7.1 MiB	C++	1.2 KiB	2026-5-27 8:23:08
AC	G8tJiHuEAiNP	24ms	7 MiB	C++14(O2)	717 Bytes	2026-5-10 17:04:35
AC	PK5D4uPPhB	24ms	6.8 MiB	C++	1014 Bytes	2026-5-5 21:30:21
AC	Dg5Ox8Cclh	24ms	7.1 MiB	C++14(O2)	1.4 KiB	2026-5-13 16:10:47
AC	ZCTCZ	25ms	6.9 MiB	C++	1.1 KiB	2026-5-21 0:29:16
AC	vH7pCzkYBW	26ms	6.7 MiB	C++	1.4 KiB	2026-5-29 15:45:10
AC	e8pySuhGEO	26ms	6.8 MiB	C++	2.2 KiB	2026-5-2 22:18:08
AC	qazaq	26ms	6.8 MiB	C++	1.2 KiB	2026-6-13 13:50:36
AC	edNFyuYLek	433ms	16.2 MiB	Python 3	951 Bytes	2026-5-2 9:27:07
AC	4lNidPbl5F	438ms	15.9 MiB	Python 3	921 Bytes	2026-5-25 18:42:05
AC	EgpLLgOJNTMm	439ms	16 MiB	Python 3	1021 Bytes	2026-5-28 18:06:54
AC	9SqURocUXc	445ms	15.9 MiB	Python 3	952 Bytes	2026-6-23 1:03:30
AC	uEimPPKO47	446ms	16.1 MiB	Python 3	701 Bytes	2026-5-5 8:27:23
AC	13larwhBIH	446ms	16 MiB	Python 3	679 Bytes	2026-4-30 22:18:09
AC	alei	448ms	16 MiB	Python 3	934 Bytes	2026-5-23 11:26:29
AC	KchZacV2Qw	453ms	16.1 MiB	Python 3	695 Bytes	2026-5-13 3:30:29
AC	W7qtPq71wy95	453ms	15.8 MiB	Python 3	1.4 KiB	2026-6-24 0:26:17
AC	aG8fxAnqbq	453ms	15.9 MiB	Python 3	996 Bytes	2026-6-5 21:33:22
AC	bxDfS5u0lX	456ms	16 MiB	Python 3	1.6 KiB	2026-4-30 23:31:14
AC	dCK9C3YqUr	460ms	16.1 MiB	Python 3	952 Bytes	2026-5-10 13:39:50
AC	andy1997	461ms	16.1 MiB	Python 3	917 Bytes	2026-5-16 10:36:49
AC	l4Wpf57Vmo	464ms	16 MiB	Python 3	731 Bytes	2026-5-6 19:36:12
AC	lkx030322	464ms	16 MiB	Python 3	809 Bytes	2026-5-2 19:13:47
AC	yanyuAC	470ms	16.1 MiB	Python 3	951 Bytes	2026-4-30 15:59:19
AC	63vK0ZuFRr	481ms	16 MiB	Python 3	913 Bytes	2026-6-9 20:54:09
AC	nwoPeVyxo0	483ms	16.2 MiB	Python 3	810 Bytes	2026-4-30 15:27:40
AC	zycccc	488ms	16 MiB	Python 3	924 Bytes	2026-5-5 8:33:21
AC	IKn7JPRjCR	561ms	16 MiB	Python	866 Bytes	2026-6-21 17:56:04
AC	g43W7LHM6F	657ms	42.2 MiB	Java	1.1 KiB	2026-5-12 19:41:56
AC	bSekmGD2D8	672ms	42.3 MiB	Java	881 Bytes	2026-5-12 17:40:11
AC	xiaxo401	673ms	42.6 MiB	Java	1.4 KiB	2026-5-23 18:37:14
AC	BaNKPB111b	677ms	42.3 MiB	Java	1.1 KiB	2026-5-1 0:08:51
AC	dMdXeTGhDq	678ms	41.8 MiB	Java	1.3 KiB	2026-6-20 14:08:52
AC	v2Gx8xqlvw	689ms	41.8 MiB	Java	1.1 KiB	2026-6-11 10:30:51
AC	3zWfCPi6iQ	692ms	41.7 MiB	Java	1018 Bytes	2026-6-11 23:11:21
AC	karry	694ms	42 MiB	Java	1.1 KiB	2026-6-17 18:41:16
AC	TaZi	697ms	42.2 MiB	Java	1.2 KiB	2026-4-30 11:26:04
AC	rl5nb0Mb83	697ms	42 MiB	Java	926 Bytes	2026-5-3 11:27:24
AC	GZbvr4v3fa	712ms	42.7 MiB	Java	1.2 KiB	2026-5-13 17:28:07
AC	Peony	724ms	42.7 MiB	Java	1 KiB	2026-5-25 13:38:19
AC	3hhhboy	737ms	42.3 MiB	Java	1.2 KiB	2026-5-29 21:48:35