保留三位小数

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	412 金浩泽	21ms	23.3 MiB	Python 3	36 Bytes	2026-5-25 14:56:04
AC	l (410刘梓州)	22ms	23.3 MiB	Python 3	40 Bytes	2026-5-25 15:21:21
AC	410李皓立	23ms	23.3 MiB	Python 3	38 Bytes	2026-5-25 15:38:32
AC	初一406班曹欢	24ms	23.3 MiB	Python 3	36 Bytes	2026-5-20 12:11:14
AC	406岳家锐	24ms	23.3 MiB	Python 3	36 Bytes	2026-5-25 15:48:04
AC	赵梓硕	24ms	23.3 MiB	Python 3	36 Bytes	2026-5-25 15:23:25
AC	406巴彦霓	27ms	23.3 MiB	Python 3	40 Bytes	2026-5-25 15:23:19
AC	张芮嘉初一410	29ms	23.3 MiB	Python 3	36 Bytes	2026-5-25 15:17:27