「一本通 6.5 例 3」Fibonacci 前 n 项和

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	BC20280008	20ms	380 KiB	C++17(O2)	2 KiB	2025-12-27 22:01:29
AC	C20250073	21ms	376 KiB	C++17(O2)	722 Bytes	2024-6-15 11:26:06
AC	BC20280086	21ms	396 KiB	C++17(O2)	1.1 KiB	2025-12-27 12:20:02
AC	ksmkqwq	21ms	384 KiB	C++17(O2)	981 Bytes	2023-9-15 9:55:51
AC	SamuelXuch	22ms	504 KiB	C++17(O2)	1.1 KiB	2025-12-27 12:06:44
AC	BC20280005	22ms	380 KiB	C++14(O2)	934 Bytes	2025-12-27 12:14:59
AC	CC20270003	23ms	504 KiB	C++14(O2)	1.2 KiB	2025-12-27 12:10:39