【入门】求圆环的面积

状态	递交者	时间	内存	语言	代码	递交时间
AC	kk007	2ms	560 KiB	C++14 (O2)	167 Bytes	2026-11-1 10:06:48
AC	cll	2ms	576 KiB	C++14 (O2)	160 Bytes	2026-9-13 10:25:19
AC	kk010	2ms	564 KiB	C++14 (O2)	194 Bytes	2026-10-11 19:02:55
AC	kk104	2ms	568 KiB	C++14 (O2)	143 Bytes	2026-9-19 9:49:54
AC	kk390	18ms	3.8 MiB	Python 3	94 Bytes	2026-9-6 16:55:20
AC	kk020	19ms	3.7 MiB	Python 3	90 Bytes	2026-10-15 18:59:32
AC	kk015	20ms	3.7 MiB	Python 3	90 Bytes	2026-9-27 17:13:49
AC	kk059	22ms	3.9 MiB	Python 3	80 Bytes	2026-9-10 19:14:45
AC	kk014	30ms	3.8 MiB	Python 3	96 Bytes	2026-9-27 15:13:38