求1+2+3+...+n 的和

状态	递交者	时间	内存	语言	代码	递交时间
AC	majiachen	21ms	6.9 MiB		171 Bytes	2023-10-14 17:21:55
AC	majiachen	21ms	384 KiB		158 Bytes	2023-3-18 18:36:48
AC	bihaoyu	21ms	384 KiB		145 Bytes	2023-3-23 19:48:25
AC	chengjunran	23ms	512 KiB		182 Bytes	2023-3-18 18:29:41
AC	Angel	23ms	512 KiB		164 Bytes	2023-3-18 18:28:02
AC	majiachen	24ms	512 KiB		158 Bytes	2023-3-18 18:36:23
AC	鸭缩毛巾	24ms	512 KiB		172 Bytes	2023-3-18 17:55:11
AC	wanglvyan	26ms	528 KiB		172 Bytes	2023-3-19 18:44:10
AC	shihaocheng	28ms	7.2 MiB		180 Bytes	2024-1-20 18:15:57
AC	tuyandi	298ms	4 MiB	Python 3	36 Bytes	2023-3-20 21:54:32
AC	喝酒の吟游诗人	308ms	4 MiB	Python 3	41 Bytes	2023-3-19 22:24:53