就是一个优化
可以自行 bdfs
by LeTu_Jun @ 2022-11-27 09:26:03
@[GavinCQTD](/user/770431) [这个](https://ffis.me/baidu/index.html?O2%E4%BC%98%E5%8C%96%E6%98%AF%E4%BB%80%E4%B9%88)
by WA_sir @ 2022-11-27 09:30:09
@[GavinCQTD](/user/770431) 这样简单的问题应该放到灌水区,不然有可能被判wyy
by register_new @ 2022-11-27 09:32:49