> #include <cstdio>
> #include <cstring>
> 
> using namespace std;
> 
> int main()
> {
>   int t,m,a,b,ans,k[10000];
>   long long left[10000],right[10000],num,adder,best;
>  
>   scanf("%d",&t);
>   while (t--)
>     {
>       scanf("%d%d%d",&m,&a,&b);
>       for(int i=0;i<m;i++)
> 	scanf("%d",&k[i]);
>       left[0]=0;num=k[0];adder=0;
>       for (int i=1;i<m;i++)
> 	{
> 	  left[i]=left[i-1]+num*a+adder;
> 	  adder+=num;num+=k[i];
> 	}
>       right[m-1]=0;num=k[m-1];adder=0;
>       for (int i=m-2;i>=0;i--)
> 	{
> 	  right[i]=right[i+1]+num*b+adder;
> 	  adder+=num;num+=k[i];
> 	}
>       best=1000000000;best=best*best;      
>       for (int i=0;i<m;i++)
> 	if (left[i]+right[i]<best)
> 	  {
> 	    best=left[i]+right[i];ans=i;
> 	  }
>       printf("%d\n",ans+1);
>     }
>   return 0;
> }