【入门】拿到某个数的概率是多少？

状态	递交者	时间	内存	语言	代码	递交时间
AC	zou123	3ms	276 KiB	C++ 11	256 Bytes	2021-12-1 14:48:32
AC	shuyao	8ms	412 KiB	C++ 14	275 Bytes	2023-7-17 20:33:59
AC	thxgg	8ms	536 KiB	C++14(O2)	274 Bytes	2023-11-22 22:32:25
AC	ruth	12ms	404 KiB	C++ 14	270 Bytes	2021-12-28 10:23:59
AC	176138419	14ms	320 KiB	C++ 17	358 Bytes	2022-1-14 22:02:28
AC	yu12345	16ms	496 KiB	C++ 14	334 Bytes	2022-4-16 18:57:57
AC	wan	17ms	336 KiB	C++ 14	334 Bytes	2022-4-17 14:29:20
AC	zou123	17ms	404 KiB	C++ 11	258 Bytes	2021-12-1 14:49:11
AC	stong9070	94ms	8.6 MiB	Python 3	151 Bytes	2023-4-11 20:04:24