计算圆环的面积

状态	递交者	时间	内存	语言	代码	递交时间
AC	jsxx-105	12ms	768 KiB	C++17(O2)	198 Bytes	2024-10-26 21:40:48
AC	jsxx-104	12ms	776 KiB	C++17(O2)	209 Bytes	2024-10-27 22:39:02
AC	jsxx-106	12ms	556 KiB	C++17(O2)	201 Bytes	2024-10-27 22:54:28
AC	jsxx-109	12ms	536 KiB	C++17(O2)	200 Bytes	2024-10-27 17:56:39
AC	jsxx-101	12ms	764 KiB	C++17(O2)	204 Bytes	2024-10-28 8:08:56
AC	nbzzw	12ms	536 KiB	C++17(O2)	226 Bytes	2024-10-14 9:37:20
AC	jsxx-108	12ms	536 KiB	C++17(O2)	201 Bytes	2024-10-26 22:22:03