#include <bits/stdc++.h>
#define LL long long
using namespace std;
const int N = 3e5 + 10;
const int INF = 0x3f3f3f3f;
struct duce
{
	int c;
	int t;
};
int n , m , k , s , a , v [N] , ans;
queue < duce > q;

int main()
{
	    cin >> n;
	    while ( n-- )
	    {
	    	cin >> m >> k;
	    	while ( k-- )
	    	{
	    		cin >> a;
	    		q . push ((duce) {a , m});
	    		v [a]++;
	    		if (v [a] == 1)
	    		{
	    			ans++;
				}
			}
			while (m - q . front (). t >= 86400)
			{
				v [q . front (). c]--;
				if (!v [q . front (). c])
				    ans--;
				q . pop ();
			}
			cout << ans << endl;
		}
		return 0;
}