输出保留 3 位小数的浮点数

状态	递交者	时间	内存	语言	代码	递交时间
AC	刘宇轩	37ms	808 KiB	C++11(O2)	110 Bytes	2026-5-30 9:38:20
AC	章馨然	38ms	816 KiB	C++11(O2)	121 Bytes	2026-5-30 9:05:59
AC	郭梓宸	38ms	816 KiB	C++11(O2)	138 Bytes	2026-5-30 9:36:55
AC	赵昱棋	38ms	852 KiB	C++11(O2)	123 Bytes	2026-5-30 9:28:29
AC	赵绍翔	39ms	808 KiB	C++11(O2)	109 Bytes	2026-5-30 9:34:13
AC	史恪正	39ms	812 KiB	C++11(O2)	116 Bytes	2026-5-30 9:28:57
AC	吴嘉毅	39ms	816 KiB	C++11(O2)	119 Bytes	2026-5-30 9:34:08
AC	陈宛晴	39ms	808 KiB	C++11(O2)	136 Bytes	2026-5-30 9:05:41
AC	杨博涵	39ms	808 KiB	C++11(O2)	152 Bytes	2026-5-30 9:07:51
AC	刘馨雅	39ms	812 KiB	C++11(O2)	123 Bytes	2026-5-30 9:24:06
AC	伏书阳	39ms	812 KiB	C++11(O2)	121 Bytes	2026-6-6 7:54:58
AC	李羽健	39ms	880 KiB	C++11(O2)	121 Bytes	2026-5-30 9:08:40
AC	刘一鹤	39ms	808 KiB	C++11(O2)	124 Bytes	2026-5-30 9:47:39
AC	武润泽	39ms	804 KiB	C++11(O2)	131 Bytes	2026-5-30 9:38:48
AC	雷史子越	39ms	808 KiB	C++11(O2)	123 Bytes	2026-5-30 9:11:07
AC	金星辰	39ms	812 KiB	C++11(O2)	122 Bytes	2026-5-30 9:53:19
AC	程士桓	40ms	812 KiB	C++11(O2)	134 Bytes	2026-6-6 8:35:18