练7.2 保留12位小数

状态	递交者	时间	内存	语言	代码	递交时间
AC	15884294003	24ms	564 KiB	C++14	138 Bytes	2026-11-1 21:22:23
AC	u24002	25ms	536 KiB	C++17	107 Bytes	2024-11-30 14:45:01
AC	15883847081	25ms	768 KiB	C++14	124 Bytes	2026-10-31 12:00:08
AC	u24011	25ms	508 KiB	C++17	120 Bytes	2025-5-10 11:53:32
AC	15183854388	28ms	512 KiB	C++14	124 Bytes	2026-10-31 17:34:44
AC	18016144180	28ms	768 KiB	C++14	130 Bytes	2026-11-2 19:09:39
AC	u24004	29ms	768 KiB	C++14	116 Bytes	2025-9-13 11:57:12
AC	13419046117	29ms	764 KiB	C++14	139 Bytes	2026-10-31 20:28:51