#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define f first
#define s second
#define GG ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
int main () { GG;
int t=1; cin>>t;
while(t--){
int n,b=0,s=0,ans=0; cin>>n;
int a[n];
for(int i=0;i<n;i++) cin>>a[i];
 
for(int i=0;i<n;i++)
{
  if(a[i]>= b)
  { if(a[i]==s)
    ans++;
    b=a[i];
  }
  else if( b == (s-b)+a[i] )
  {
  ans++;
 
  }
s+=a[i];
}
 
 
 
cout<<ans<<"\n";
}return 0;}

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7
1
0
1
1
4
1 1 2 0
5
0 1 2 1 4
7
1 1 0 3 5 2 12
7
1000000000 1000000000 1000000000 1000000000 1000000000 1000000000 294967296
10
0 1000000000 1000000000 1000000000 1000000000 1000000000 1000000000 1000000000 1000000000 589934592