FBI树

2019-9-8

牛客假日赛的一道题,很不错。记录一下


筱玛爱地理

2019-6-26

I have heared Inverse-modulo(逆元) before,I can't understand it clearly that time till I met this problem yesterday.


Times 17

2019-6-14

When all else is lost the future still remains.


风雨无阻

2019-5-26

Becouse all kinds of reasons,I haven't done a problem for a long time.But the main is I'm tired.As the saying goes"I also paid, but why are they so strong?"


灰魔法师

2019-5-24

A problem was met in a prgramming contest before.When I tried to solve this I find it's a meaningful problem.


Stone

2019-4-26

Think in another way!!!