【例】保留3位小数的浮点数

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	沈鼎皓	23ms	5.9 MiB	C++14(O2)	136 Bytes	2024-10-14 11:55:39
AC	DH-LZR	24ms	6.2 MiB	C++14(O2)	131 Bytes	2024-12-22 12:29:48
AC	张意驰	24ms	6.2 MiB	C++14(O2)	123 Bytes	2025-1-20 10:47:55
AC	綦文暄	24ms	5.9 MiB	C++14(O2)	132 Bytes	2024-9-22 10:36:29
AC	帅昕妍	25ms	6 MiB	C++14(O2)	137 Bytes	2024-7-31 15:53:40
AC	程裕澍	26ms	6.1 MiB	C++14(O2)	133 Bytes	2024-9-15 11:43:58
AC	邱怡辰	26ms	6.2 MiB	C++14(O2)	137 Bytes	2025-2-15 11:56:22
AC	张天源	26ms	6.2 MiB	C++14(O2)	135 Bytes	2025-1-6 17:23:00
AC	王嘉怡	26ms	6.3 MiB	C++14(O2)	124 Bytes	2025-4-6 14:40:34
AC	方一帆	29ms	6.2 MiB	C++14(O2)	132 Bytes	2024-8-20 15:20:20
AC	刘思锐	29ms	6.1 MiB	C++14(O2)	133 Bytes	2024-9-7 16:08:22
AC	王艺皓	30ms	6 MiB	C++14(O2)	136 Bytes	2024-9-21 9:31:03
AC	付佳敏	30ms	5.9 MiB	C++14(O2)	142 Bytes	2024-9-27 16:58:00
AC	尹攸雨濛	31ms	6.1 MiB	C++14(O2)	132 Bytes	2024-9-7 15:58:39
AC	罗莎	31ms	6 MiB	C++14(O2)	105 Bytes	2024-8-31 21:54:18
AC	杨如楠	34ms	5.9 MiB	C++14(O2)	135 Bytes	2024-9-26 14:37:53
AC	冯昱哲	34ms	6.2 MiB	C++14(O2)	120 Bytes	2025-1-14 15:54:12
AC	费轩栩	37ms	6.1 MiB	C++14(O2)	135 Bytes	2024-9-7 10:13:51
AC	高宇豪	393ms	10.2 MiB	Python 3	42 Bytes	2024-8-21 13:46:01