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	20240622	25ms	512 KiB	C++17	148 Bytes	2026-1-25 20:17:12
AC	20240414	26ms	768 KiB	C++17	139 Bytes	2026-1-16 12:43:25
AC	20240633	26ms	516 KiB	C++17	148 Bytes	2026-1-23 12:55:40
AC	20230330	27ms	768 KiB	C++17	142 Bytes	2026-1-16 12:41:57
AC	20230313	27ms	512 KiB	C++17	142 Bytes	2026-1-16 12:44:26
AC	Luo	27ms	768 KiB	C++17	138 Bytes	2026-1-23 13:04:39
AC	20240416	27ms	512 KiB	C++17	139 Bytes	2026-1-16 12:58:28
AC	Luckyu	27ms	508 KiB	C++98	150 Bytes	2026-1-5 8:48:26
AC	20240306	27ms	532 KiB	C++17	128 Bytes	2026-1-23 12:59:53