把里面的 * 和 / 改成位运算，然后码个快读和快写
by InsomniaFly @ 2021-01-23 11:05:22
另外你的code RE了...
by InsomniaFly @ 2021-01-23 11:10:56
~~感谢你让我有了题刷~~
by _SqrtTree_ @ 2021-01-23 14:52:45
~~终于要有了第四道黄题~~
by _SqrtTree_ @ 2021-01-23 14:54:28