【例3.1】输出表达式的值

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	辛佳蔚	2ms	6.1 MiB	C++ 17	120 Bytes	2023-4-17 18:37:19
AC	辛雨航	2ms	6.3 MiB	C++ 17	110 Bytes	2023-4-15 9:13:11
AC	单秋舒	2ms	6.1 MiB	C++ 17	165 Bytes	2023-4-17 18:33:28
AC	单希乐	2ms	6.5 MiB	C++ 17	138 Bytes	2023-4-22 22:38:13
AC	朱文博	2ms	6.2 MiB	C++ 17	116 Bytes	2023-4-17 19:02:41
AC	徐小格	2ms	6.4 MiB	C++ 17	130 Bytes	2023-5-7 15:48:23
AC	东明张展奕	2ms	6.1 MiB	C++ 17	123 Bytes	2023-4-21 15:12:52
AC	张锦昊	2ms	6.4 MiB	C++ 17	109 Bytes	2023-5-7 14:16:03
AC	李镇宇	2ms	6.3 MiB	C++ 17	117 Bytes	2023-4-15 9:24:09
AC	王宇浩	2ms	6.3 MiB	C++ 17	135 Bytes	2023-4-16 15:19:25
AC	崔行磊	2ms	6.2 MiB	C++ 17	104 Bytes	2023-5-10 17:12:11
AC	张锦昊	2ms	6.3 MiB	C++ 17	107 Bytes	2023-4-16 15:17:39
AC	张峻溪	2ms	6.3 MiB	C++ 17	129 Bytes	2023-4-17 20:48:56
AC	李继轩	2ms	6.3 MiB	C++ 17	117 Bytes	2023-4-15 9:00:58
AC	李润楷	2ms	6.3 MiB	C++ 17	102 Bytes	2023-4-16 15:13:50
AC	杜佳宁	2ms	6.4 MiB	C++ 17	105 Bytes	2023-5-7 14:16:48
AC	雷子轩	2ms	6.2 MiB	C++ 17	107 Bytes	2023-5-10 17:11:38
AC	褚俊泽	2ms	6.3 MiB	C++ 17	115 Bytes	2023-4-15 9:09:49
AC	高新亮	2ms	6.6 MiB	C++ 17	114 Bytes	2023-4-22 8:43:28
AC	赵泽华	2ms	6.2 MiB	C++ 17	108 Bytes	2023-5-12 21:13:03
AC	李铭硕	2ms	6.3 MiB	C++ 17	118 Bytes	2023-4-15 9:20:27
AC	王翔煜	2ms	6.3 MiB	C++ 17	114 Bytes	2023-4-16 15:12:41
AC	王鹏博	2ms	6.1 MiB	C++ 17	140 Bytes	2023-4-17 18:37:13
AC	于巍晨	2ms	6.6 MiB	C++ 17	110 Bytes	2023-4-22 8:41:50
AC	李浩北	2ms	6.4 MiB	C++ 17	111 Bytes	2023-5-7 17:28:40
AC	林晓彤	2ms	6.3 MiB	C++ 17	117 Bytes	2023-4-15 9:22:04
AC	朱梦飞	2ms	6.3 MiB	C++ 17	119 Bytes	2023-4-16 15:30:38
AC	邴诚文	2ms	6.1 MiB	C++ 17	110 Bytes	2023-4-21 17:24:06
AC	朱梦飞	2ms	6.3 MiB	C++ 17	120 Bytes	2023-4-16 15:17:01
AC	朱梦飞	2ms	6.4 MiB	C++ 17	105 Bytes	2023-5-7 14:16:24
AC	yuyongchao	2ms	6.2 MiB	C++ 17	103 Bytes	2023-5-10 17:06:33
AC	李承林	2ms	6 MiB	C++ 17	136 Bytes	2023-4-20 19:37:19
AC	张峻溪	2ms	6.6 MiB	C++ 17	113 Bytes	2023-4-22 8:40:38
AC	李镇宇	2ms	6.3 MiB	C++ 17	117 Bytes	2023-4-15 9:23:05
AC	褚志鸿	2ms	6.3 MiB	C++ 17	109 Bytes	2023-4-16 15:20:05
AC	任家辉	2ms	6.3 MiB	C++ 17	125 Bytes	2023-5-21 21:20:48
AC	辛雨航	2ms	6.6 MiB	C++ 17	113 Bytes	2023-4-22 8:42:10
AC	刘润耕	2ms	6.1 MiB	C++ 17	217 Bytes	2023-4-17 18:36:49
AC	马博显	2ms	6.3 MiB	C++ 17	118 Bytes	2023-4-29 11:05:19
AC	考试账号1	2ms	6.3 MiB	C++ 17	110 Bytes	2023-4-15 8:56:45
AC	高玮鸿	2ms	6.3 MiB	C++ 17	118 Bytes	2023-4-15 9:19:34
AC	杜宗骏	2ms	6.1 MiB	C++ 17	110 Bytes	2023-4-20 20:21:01
AC	梁笑语	2ms	6 MiB	C++ 17	109 Bytes	2023-4-20 18:08:57
AC	于巍晨	2ms	6.3 MiB	C++ 17	110 Bytes	2023-4-15 8:46:21
AC	东明贾皓程	2ms	6.3 MiB	C++ 17	129 Bytes	2023-5-28 16:58:37
AC	崔意久	2ms	6 MiB	C++ 17	242 Bytes	2023-4-17 18:35:36
AC	王翔煜	2ms	6.3 MiB	C++ 17	114 Bytes	2023-4-16 14:40:00
AC	苗洛然	2ms	6.4 MiB	C++ 17	108 Bytes	2023-5-7 17:24:20
AC	张峻溪	2ms	6.3 MiB	C++ 17	129 Bytes	2023-4-17 20:30:00