```cpp
NTT(a,lim,1);
```
改成-1试一试
by letitdown @ 2022-06-24 20:00:36
YYYYes!!!
by BMMULLER @ 2022-06-24 20:01:08
@[letitdown](/user/451066) 谢谢您的回复,但是我还是跑不动样例诶
by PureMotivation @ 2022-06-24 20:02:03
```cpp
inline int ksm(int x,int y){int res=1; for(;y;y--) ckmul(res,x); return res;}
```
建议上网上学习一下快速幂
by letitdown @ 2022-06-24 20:02:26
?我写的快速幂有什么问题吗?
by PureMotivation @ 2022-06-24 20:03:06
而且不`define int long long`还不用`1ll`是怎么回事呀?咋整的呀!
by letitdown @ 2022-06-24 20:03:35
@[yspm](/user/97448)
这写的没问题啊为什么会 TLE 啊.
感觉是被卡常了 .
by zero4338 @ 2022-06-24 20:05:29
快速幂是这样子的:
```cpp
inline int ksm(int a,int b){
int ans=1;
while(b){
if(b&1)ans=1ll*a*ans%mod;
a=1ll*a*a%mod;b>>=1;
}return ans;
}
```
by letitdown @ 2022-06-24 20:06:10
@[PureMotivation](/user/544636) 龟 速 幂
by Static_int @ 2022-06-24 20:08:08
另外b数组从1开始读入是咋回事呀?给我吓一跳!
by letitdown @ 2022-06-24 20:08:10