练8.2 完成习题

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	Oxygen	14ms	508 KiB	C++14	138 Bytes	2025-5-29 14:22:46
AC	Mch121018	14ms	508 KiB	C++14(O2)	124 Bytes	2025-7-4 16:53:15
AC	马康智xly2025	14ms	504 KiB	C++14(O2)	117 Bytes	2025-7-7 20:10:31
AC	shtian	14ms	536 KiB	C++98	112 Bytes	2024-7-12 12:57:41
AC	string_dbr	15ms	504 KiB	C++14(O2)	138 Bytes	2025-5-26 15:05:17
AC	黄昭明xly2025	15ms	508 KiB	C++14(O2)	108 Bytes	2025-7-4 11:48:39