【入门】已知一个圆的半径，求解该圆的面积和周长

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	jyc	11ms	768 KiB	C++14(O2)	233 Bytes	2026-4-19 14:31:12
AC	丁资凡	14ms	1 MiB	C++14(O2)	159 Bytes	2026-4-19 21:46:24
AC	程俊皓	17ms	1 MiB	C++14(O2)	221 Bytes	2026-4-16 20:31:30
AC	zct	19ms	768 KiB	C++14(O2)	196 Bytes	2026-4-19 14:38:04
AC	jkkhvgukilknjkbhgyi	19ms	1 MiB	C++14(O2)	162 Bytes	2026-4-19 14:34:50
AC	yh2025	21ms	768 KiB	C++14(O2)	221 Bytes	2026-4-15 22:19:34
AC	刘诗瑶	38ms	768 KiB	C++14(O2)	223 Bytes	2026-4-26 19:39:54
AC	严梓瑄	40ms	768 KiB	C++14(O2)	217 Bytes	2026-4-26 20:24:07
AC	六(8)班李昕豫	40ms	1 MiB	C++14(O2)	217 Bytes	2026-4-22 20:49:45
AC	严梓绮	41ms	512 KiB	C++14(O2)	264 Bytes	2026-4-26 21:33:19
AC	黄厚铭1.04	43ms	1 MiB	C++14	187 Bytes	2026-5-2 15:20:26