练8.2 完成习题

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	jihaoyuan	13ms	548 KiB	C++98	120 Bytes	2025-1-20 11:33:00
AC	nianyanimen	13ms	536 KiB	C++98	115 Bytes	2024-7-24 10:04:48
AC	wangyonglin	13ms	764 KiB	C++98	116 Bytes	2024-7-24 9:59:38
AC	lihaorui	14ms	768 KiB	C++98	103 Bytes	2025-1-21 9:09:56
AC	zhuyinuo	15ms	764 KiB	C++98	125 Bytes	2025-1-20 15:30:06
AC	jiashixuan	15ms	536 KiB	C++98	109 Bytes	2024-7-19 8:57:07