求 1+2+3+...+N 的值

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	郑健	30ms	696 KiB	C99	165 Bytes	2025-10-19 11:33:38
AC	Yang_Yichen	33ms	804 KiB	C++17(O2)	164 Bytes	2025-7-9 10:23:42
AC	谢乐逸	33ms	808 KiB	C++17(O2)	1.3 KiB	2025-8-28 8:39:43
AC	王誉州	34ms	808 KiB	C++17(O2)	104 Bytes	2025-11-16 13:09:39
AC	munger	35ms	808 KiB	C++17(O2)	352 Bytes	2025-5-2 16:43:45
AC	thy2012	35ms	800 KiB	C++17(O2)	125 Bytes	2025-7-31 19:43:17
AC	charly666	35ms	808 KiB	C++17(O2)	165 Bytes	2025-11-14 13:31:51
AC	小贝	36ms	792 KiB	C++17(O2)	176 Bytes	2025-7-11 10:28:40
AC	cokexiaomao	36ms	808 KiB	C++17(O2)	163 Bytes	2025-7-10 9:30:06
AC	东渡实验学校许淳熙	37ms	808 KiB	C++17(O2)	147 Bytes	2024-12-6 19:11:30
AC	Megatron	37ms	804 KiB	C++17(O2)	145 Bytes	2025-7-8 17:02:55
AC	周海洋	38ms	752 KiB	C++17(O2)	142 Bytes	2025-7-10 9:59:43
AC	宋科润	38ms	864 KiB	C++17(O2)	176 Bytes	2025-8-8 11:51:42
AC	lvyu666	38ms	808 KiB	C++17(O2)	259 Bytes	2026-2-8 18:22:57
AC	PbCoder	39ms	808 KiB	C++14(O2)	130 Bytes	2025-1-18 19:56:22
AC	xxzc001	39ms	808 KiB	C++17(O2)	192 Bytes	2025-2-2 21:38:33
AC	xiaopa	39ms	812 KiB	C++17(O2)	234 Bytes	2026-2-8 18:23:08
AC	FJK	40ms	860 KiB	C++17(O2)	173 Bytes	2024-12-14 10:40:46
AC	chenzhan930	40ms	804 KiB	C++17(O2)	171 Bytes	2024-12-14 10:38:40
AC	zsh20130919	40ms	808 KiB	C++11	173 Bytes	2025-2-22 14:35:06
AC	落苏不吃糖	40ms	816 KiB	C++17(O2)	198 Bytes	2025-3-9 22:53:05
AC	jiangfangzhou	40ms	812 KiB	C++17(O2)	328 Bytes	2026-2-8 18:23:23