好吧是方程写错了
by Cobalt @ 2018-05-30 17:59:36
应该是这个
```cpp
for(i=2;i<=n;i++){
for(j=1;j<=2*n-i;j++){
for(k=j;k<j+i-1;k++){
if(f[j][j+i-1]<f[j][k]+f[k+1][j+i-1]+a[j]*a[k+1]*a[j+i])
f[j][j+i-1]=f[j][k]+f[k+1][j+i-1]+a[j]*a[k+1]*a[j+i];
}
}
}
```
by Cobalt @ 2018-05-30 18:00:16
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by Verusins @ 2018-05-30 19:27:01