focal loss计算

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	xVoxWKEa6h	333ms	13.1 MiB	Python 3	362 Bytes	2025-12-21 10:35:57
AC	TaZi	333ms	13.1 MiB	Python 3	344 Bytes	2025-12-1 20:42:43
AC	CodeFund61c6a2d94	334ms	13.1 MiB	Python 3	344 Bytes	2025-12-26 14:54:56
AC	XamtEQqb9J	334ms	13.1 MiB	Python 3	587 Bytes	2026-1-3 22:35:23
AC	Ks2eatJIFA	335ms	13.1 MiB	Python 3	614 Bytes	2025-12-22 4:07:38
AC	saHmj3OsRS	336ms	13.1 MiB	Python 3	342 Bytes	2025-12-20 23:01:37
AC	CodeFund3b713f76d	336ms	13.1 MiB	Python 3	610 Bytes	2026-1-13 11:29:49
AC	CodeFunf1e0256225	338ms	13.1 MiB	Python 3	544 Bytes	2025-12-6 23:08:27
AC	u3PArlv3GS	340ms	13.1 MiB	Python 3	511 Bytes	2026-1-13 22:59:54
AC	krkrkrkrk	341ms	13.1 MiB	Python 3	499 Bytes	2025-12-16 13:31:53
AC	CodeFun6ebed1f2e8	342ms	13.1 MiB	Python 3	588 Bytes	2026-1-13 16:04:01
AC	胖胖	343ms	13.1 MiB	Python 3	547 Bytes	2025-12-8 21:26:13
AC	CodeFun006265025d	344ms	13.1 MiB	Python 3	344 Bytes	2026-1-14 9:58:37
AC	azIdRoBtBN	348ms	13.1 MiB	Python 3	344 Bytes	2025-12-19 21:45:50
AC	WRJEJcU758	350ms	13.1 MiB	Python 3	505 Bytes	2025-12-15 20:43:52
AC	0QhamUopRx	374ms	13.1 MiB	Python 3	599 Bytes	2026-1-1 20:08:32
AC	cazero	378ms	13.1 MiB	Python 3	595 Bytes	2025-12-25 22:09:46
AC	vPiQdBRuI6	1340ms	35.6 MiB	Python 3	616 Bytes	2025-12-18 21:59:03