标签：log show ble src its com mit mamicode alt
https://www.luogu.org/problemnew/show/P5348
题解链接：https://www.cnblogs.com/cj-xxz/p/10812358.html
注意几个结论：
密码解锁
原文地址：https://www.cnblogs.com/pthws/p/11087302.html
