#include <iostream>
using namespace std;
int ile, i_liczb;
int wynik[100];
int main()
{
cin>>ile;
long long prefix=0;
long long sufix=0;
for (int i=0; i<=ile-1; i++)
{
cin>>i_liczb;
if (i_liczb==1){wynik[i]=0;}
else {
int liczby[(i_liczb)-1];
for (int n=0; n<=i_liczb-1; n++)
{
cin>>liczby[n];
}
for (int n=0; n<=i_liczb-1; n++)
{
prefix=(prefix+liczby[n]);
for (int m=n+1; m<=i_liczb-1; m++)
{
sufix+=liczby[m];
}
if (prefix==sufix){wynik[i]=n+1; n=i_liczb;}
if (wynik[i]>=i_liczb){wynik[i]=0;}
else {sufix=0;}
}
{
sufix=0;
prefix=0;
}
}
}
for (int n=0; n<=ile-1; n++)
{
cout<<wynik[n]<<endl;
}
return 0;
}
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