练45.1 计算2的幂

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	ludaichen	25ms	540 KiB	C++11	151 Bytes	2024-7-31 17:36:15
AC	chenzihao	25ms	508 KiB	C++11	156 Bytes	2025-5-17 8:45:53
AC	liujinghang	28ms	536 KiB	C++11	135 Bytes	2024-8-23 20:46:59
AC	chenwangzixuan	29ms	764 KiB	C++11	152 Bytes	2024-7-25 16:20:05