输出保留 3 位小数的浮点数

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	严晨航	31ms	808 KiB	C++14(O2)	142 Bytes	2025-8-26 15:55:40
AC	Harry	32ms	812 KiB	C++14	175 Bytes	2025-8-18 18:50:05
AC	sage2012	33ms	808 KiB	C++14(O2)	126 Bytes	2025-9-19 20:46:07
AC	张叶朵	33ms	804 KiB	C++14(O2)	160 Bytes	2025-8-27 23:10:48
AC	刘喻蔓	33ms	756 KiB	C++14(O2)	142 Bytes	2025-12-4 15:32:36
AC	w20120404	34ms	852 KiB	C++14(O2)	138 Bytes	2025-8-19 15:14:18
AC	龙肖瑾xly2025	34ms	768 KiB	C++14(O2)	142 Bytes	2025-7-27 22:03:20
AC	谭博文	34ms	808 KiB	C++14(O2)	135 Bytes	2025-10-7 14:19:01
AC	钟执墨2026dly	34ms	808 KiB	C++14(O2)	136 Bytes	2026-1-9 20:01:28
AC	若白	35ms	764 KiB	C++17(O2)	122 Bytes	2025-7-11 14:37:50
AC	maochengjun	35ms	808 KiB	C++14	141 Bytes	2025-7-9 11:38:05
AC	陆昊宇	35ms	812 KiB	C++14	161 Bytes	2025-10-11 15:55:56
AC	刘熠辰	35ms	808 KiB	C++14(O2)	136 Bytes	2025-9-18 15:36:12
AC	陈国瑞	36ms	804 KiB	C++14(O2)	150 Bytes	2025-7-15 17:17:29
AC	xzh13579	36ms	808 KiB	C++14(O2)	188 Bytes	2025-7-24 23:22:09
AC	张芷若xly2025	36ms	908 KiB	C++14(O2)	144 Bytes	2025-8-8 8:33:57
AC	卢皓禹xly2025	36ms	808 KiB	C++14(O2)	143 Bytes	2025-8-31 21:28:39
AC	班振浩	36ms	796 KiB	C++14(O2)	151 Bytes	2025-10-21 10:19:42
AC	hmtzl666	37ms	808 KiB	C++14(O2)	166 Bytes	2026-3-22 20:33:14
AC	lyd	37ms	748 KiB	C++14(O2)	132 Bytes	2025-9-25 17:11:28
AC	_chjich_	38ms	808 KiB	C++14(O2)	122 Bytes	2025-7-11 9:31:38
AC	曾彦彬contest	38ms	812 KiB	C++14(O2)	166 Bytes	2025-7-7 19:41:20
AC	程俊皓1.04	38ms	816 KiB	C++14(O2)	115 Bytes	2026-3-22 9:45:57
AC	张隽语xly2025	38ms	808 KiB	C++14(O2)	142 Bytes	2025-9-6 16:10:41
AC	王思懿	38ms	808 KiB	C++14(O2)	144 Bytes	2025-8-18 10:52:16
AC	女乃龙	38ms	868 KiB	C++14(O2)	141 Bytes	2025-7-11 14:41:35
AC	余梓铭2026dly	38ms	812 KiB	C++14(O2)	104 Bytes	2026-1-28 17:25:30
AC	zzy15924600533	39ms	816 KiB	C++14(O2)	134 Bytes	2026-2-27 11:36:56
AC	李衍树xly2025	39ms	852 KiB	C++14	289 Bytes	2026-1-1 9:08:15
AC	Mch121018	39ms	808 KiB	C++17(O2)	136 Bytes	2025-9-4 22:48:43
AC	黄也洛	39ms	816 KiB	C++14(O2)	181 Bytes	2026-1-22 21:39:32
AC	米秋宇2026dly	39ms	816 KiB	C++14(O2)	134 Bytes	2026-2-5 11:31:41
AC	王熙尧2026dly	39ms	816 KiB	C++14(O2)	140 Bytes	2026-1-10 22:23:02
AC	饶子和2026dly	39ms	808 KiB	C++14(O2)	134 Bytes	2026-2-11 17:27:01
AC	安致远2026dly	39ms	812 KiB	C++14(O2)	134 Bytes	2026-1-27 18:55:26
AC	孔令宇2026dly	39ms	808 KiB	C++14(O2)	133 Bytes	2026-3-29 8:42:22
AC	李蕲航	39ms	808 KiB	C++14(O2)	121 Bytes	2026-2-26 16:29:51
AC	李承兴	40ms	852 KiB	C++14(O2)	115 Bytes	2026-2-28 17:04:25
AC	昂冠宇xly2025	40ms	852 KiB	C++14(O2)	139 Bytes	2026-3-22 20:48:22
AC	蒋欣辰	40ms	812 KiB	C++14(O2)	126 Bytes	2026-2-24 19:24:26
AC	侬孜翌2026dly	40ms	916 KiB	C++14(O2)	141 Bytes	2026-1-13 18:52:40
AC	商竣杰2026dly	40ms	812 KiB	C++14(O2)	166 Bytes	2026-1-30 15:31:25
AC	李铭凯2026dly	40ms	856 KiB	C++14(O2)	114 Bytes	2026-2-25 19:50:32
AC	蔡建宇2026dly	40ms	808 KiB	C++14(O2)	144 Bytes	2026-2-9 14:51:58
AC	谷震轩	40ms	812 KiB	C++14(O2)	114 Bytes	2026-2-26 20:06:25
AC	刘邦坤	40ms	808 KiB	C++14(O2)	132 Bytes	2026-2-24 20:02:00