逆序对的数量

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	LHY	2ms	6.4 MiB	C++14(O2)	1.3 KiB	2024-12-4 21:05:59
AC	CBH37	2ms	6.1 MiB	C++14(O2)	1.8 KiB	2025-1-5 1:12:04
AC	liuhanjin	2ms	6.1 MiB	C++14(O2)	630 Bytes	2024-3-7 20:59:31
AC	Csvoner	2ms	6.1 MiB	C++14(O2)	858 Bytes	2024-3-7 19:13:33
AC	fiend	2ms	6 MiB	C++14(O2)	858 Bytes	2024-4-23 19:38:32
AC	想想	2ms	6 MiB	C++14(O2)	599 Bytes	2024-3-13 17:29:15
AC	liuhanjin	3ms	6 MiB	C++14(O2)	540 Bytes	2024-3-13 16:24:16
AC	Steven Wang	3ms	6.6 MiB	C++14(O2)	224 Bytes	2024-9-12 20:18:02
AC	傅豪	3ms	5.9 MiB	C++14(O2)	792 Bytes	2024-3-17 9:32:52
AC	retun 0	3ms	6.4 MiB	C++14	251 Bytes	2024-12-3 19:40:46