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

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5
5 1
0 1 0 0 0
7 3
0 0 0 0 0 0 0
3 1
1 1 1
4 2
0 1 0 1
6 2
0 0 1 0 0 0