练45.1 计算2的幂

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	junjie6666	26ms	512 KiB	C++11	147 Bytes	2026-2-8 18:37:42
AC	许菡唐	27ms	536 KiB	C++11	162 Bytes	2026-2-8 16:10:30
AC	曹益通	27ms	512 KiB	C++11	136 Bytes	2026-2-8 19:39:19
AC	gjh81	28ms	776 KiB	C++11	167 Bytes	2026-2-8 19:30:30