~~您放这么多链接不累吗~~
我太蒻了,不会。
by E1_de5truct0r @ 2021-02-09 21:19:41
az......
by Kastic_pd @ 2021-02-09 21:31:05
@[HandSome_Peng](/user/307815)
```cpp
#define add(a,b) (ll)((a)+(b))%mod
#define mul(a,b) (ll)((a)*(b))%mod
```
宏定义这里必须加括号,因为C++是直接把传入的东西复制过去
例如
```cpp
#define f(x) x*2+1
f(2+3) ->2+3*2+1
#define g(x) (x)*2+1
g(2+3) ->(2+3)*2+1
```
暂时没发现别的问题
by Hope2075 @ 2021-02-09 21:36:43
oh,谢谢大佬
by Kastic_pd @ 2021-02-09 21:56:22