@[miserExist](/user/49677) 您没开 `long long`
by lovely_ckj @ 2021-07-08 09:32:21
```cpp
int C[2012][2012];
for(int i = 0; i <= 2012; i ++)
```
????不re就怪了,,,
by KING_OF_TURTLE @ 2021-07-08 09:33:55
而且在这段代码里，$i=0$ 时将会访问到 `a[-1][j]`
```
for(int i = 0; i <= 2012; i ++)
{
for(int j = 0; j <= i; j ++)
{
if(!j)C[i][j] = 1;
else C[i][j] = (C[i - 1][j - 1] + C[i - 1][j]) % k;
if(C[i][j] == 0)st[i][j] = 1;
st[i][j] += st[i - 1][min(j,i - 1)] + st[i][j - 1] - st[i - 1][j - 1]; //auto add 1
}
//st[i][i + 1] = st[i][i];
}
```
by lovely_ckj @ 2021-07-08 09:34:26
@[miserExist](/user/49677)
by lovely_ckj @ 2021-07-08 09:34:51
https://www.acwing.com/solution/content/3823/
by miserExist @ 2021-07-08 10:09:40
@[lovely_ckj](/user/251130)
by miserExist @ 2021-07-08 10:10:22
@[KING_OF_TURTLE](/user/102541)
大佬%%%
此贴终结
by miserExist @ 2021-07-08 10:12:28