【例3.1】输出表达式的值

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	347 陈思成	37ms	3.7 MiB	Python 3	30 Bytes	2025-10-28 15:30:13
AC	丁丁	37ms	3.7 MiB	Python 3	30 Bytes	2025-11-17 15:06:30
AC	初一407刘宵瑞	37ms	3.7 MiB	Python 3	30 Bytes	2025-10-23 17:17:21
AC	李严梓萌	37ms	3.7 MiB	Python 3	30 Bytes	2025-12-30 11:10:13
AC	Guest	37ms	3.8 MiB	Python 3	30 Bytes	2026-4-7 14:32:32
AC	初二349郑开午	37ms	3.7 MiB	Python 3	30 Bytes	2025-11-9 11:22:16
AC	程耀熙	37ms	3.7 MiB	Python 3	31 Bytes	2025-11-9 11:32:22
AC	木春	37ms	3.8 MiB	Python 3	30 Bytes	2026-3-18 15:38:07
AC	初一409毛思予	37ms	3.7 MiB	Python 3	30 Bytes	2025-10-28 16:38:22
AC	初一406班杨丝淳	37ms	3.7 MiB	Python 3	30 Bytes	2025-10-29 11:29:34
AC	412 冯淑瑶	37ms	3.7 MiB	Python 3	30 Bytes	2025-10-20 15:43:33
AC	张芮嘉初一410	37ms	3.8 MiB	Python 3	30 Bytes	2025-10-20 15:48:41
AC	初一407唐一铭	37ms	3.7 MiB	Python 3	30 Bytes	2025-10-28 16:58:04
AC	张芮嘉	37ms	3.7 MiB	Python 3	30 Bytes	2025-11-24 14:57:33
AC	XinHuo (初一408赵锦淳)	37ms	3.7 MiB	Python 3	30 Bytes	2025-12-30 17:09:46
AC	初二349宿益睿	37ms	3.7 MiB	Python 3	30 Bytes	2025-9-27 15:49:29
AC	初二349汪诗涵	37ms	3.8 MiB	Python 3	30 Bytes	2025-9-13 15:12:29
AC	初二351孟思羽	37ms	3.7 MiB	Python 3	30 Bytes	2025-11-20 15:44:47
AC	初一406王晨煜	37ms	3.7 MiB	Python 3	30 Bytes	2025-10-28 16:38:30
AC	初二351李崟	37ms	4.1 MiB	Python 3	30 Bytes	2025-11-25 18:29:37
AC	初一412钟滨泽	37ms	3.7 MiB	Python 3	30 Bytes	2025-10-28 16:42:04
AC	347高瑀琨	37ms	3.7 MiB	Python 3	30 Bytes	2025-11-25 15:33:53
AC	ovo (初二349王宇)	37ms	3.7 MiB	Python 3	30 Bytes	2025-11-9 11:44:03
AC	初二349周易	37ms	3.7 MiB	Python 3	30 Bytes	2025-9-27 15:32:41
AC	宋卓岩	37ms	3.8 MiB	Python 3	30 Bytes	2026-4-26 15:20:09
AC	初一410赵世成	37ms	4.1 MiB	Python 3	30 Bytes	2025-11-23 11:38:11
AC	351李圣	38ms	3.7 MiB	Python 3	38 Bytes	2025-12-11 16:34:47
AC	351班李恩娴	38ms	3.7 MiB	Python 3	31 Bytes	2025-9-27 17:10:15
AC	347班毛晨瑞	38ms	4 MiB	Python 3	30 Bytes	2025-10-28 15:19:05
AC	412冯淑瑶	38ms	3.9 MiB	Python 3	30 Bytes	2025-11-17 14:57:58
AC	349李永昊	38ms	3.7 MiB	Python 3	30 Bytes	2025-11-9 11:33:03
AC	406徐昕潼	39ms	3.8 MiB	Python 3	30 Bytes	2025-12-29 14:26:19
AC	初二 352 王耀培	41ms	3.7 MiB	Python 3	30 Bytes	2025-12-2 15:18:09