【例7.2】与圆相关的计算

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	Oxygen	25ms	532 KiB	C++14	241 Bytes	2025-5-27 18:27:35
AC	yzh1217	26ms	552 KiB	C++14(O2)	182 Bytes	2024-8-13 15:43:01
AC	string_dbr	27ms	508 KiB	C++14(O2)	214 Bytes	2025-5-26 14:54:17
AC	duobei	27ms	760 KiB	C++14	197 Bytes	2025-5-26 22:53:41
AC	shtian	28ms	548 KiB	C++98	170 Bytes	2024-7-11 13:01:06