#include <bits/stdc++.h>
using namespace std;
 
int main() {
	int t;
	cin>>t;
	while(t--){
		int n;
		cin>>n;
		vector<int> a(n);
		int sum=0,count=0;
		for(int i=0;i<n;i++){
			cin>>a[i];
			sum+=a[i];
			if(a[i]==-1) count++;
		}
		if(sum>=0 && count%2==0) cout<<0<<endl;
		else if(sum>0 && count%2!=0) cout<<1<<endl;
		else{
			if(sum%2==0 && count%2==0) cout<<-(sum)<<endl;
			else if(sum%2==0 && count%2!=0) cout<<-(sum)+1<<endl;
			else if(sum%2!=0 && count%2==0) cout<<-(sum)+1<<endl;
			else cout<<-(sum)<<endl;
		}
	}
	return 0;
}

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Nwo0Ci0xIC0xIDEgLTEKNQotMSAtMSAtMSAxIDEKNAotMSAxIC0xIDEKMwotMSAtMSAtMQo1CjEgMSAxIDEgMQoxCi0xCjIKLTEgLTEK

7
4
-1 -1 1 -1
5
-1 -1 -1 1 1
4
-1 1 -1 1
3
-1 -1 -1
5
1 1 1 1 1
1
-1
2
-1 -1