数 1 的个数

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	陈国瑞	34ms	760 KiB	C++14(O2)	1.9 KiB	2025-7-15 18:31:46
AC	王思懿	34ms	804 KiB	C++17(O2)	280 Bytes	2025-9-21 22:34:19
AC	_chjich_	37ms	808 KiB	C++14(O2)	341 Bytes	2025-7-15 16:58:49
AC	xzh13579	39ms	852 KiB	C++14(O2)	352 Bytes	2025-9-7 12:53:08