#include<bits/stdc++.h>
using namespace std;
int t;
int n;
int k;
int x[300003];
const int day=86400;
queue<vector<int>> cache;
unordered_map<int,int> dao;
int min_t=-1;
void solve()
{
	scanf("%d %d",&t,&k);
	if(min_t==-1)
	{
		min_t=t;
	}
	while(t-min_t>=day&&!cache.empty())
	{
		for(int i=1;i<cache.front().size();i++)
		{
			dao[cache.front()[i]]-=1;
		}
		for(int i=1;i<cache.front().size();i++)
		{
			if(dao.count(cache.front()[i])&&dao[cache.front()[i]]<=0)
			{
				dao.erase(cache.front()[i]);
			}
		}
		cache.pop();
		min_t=cache.front()[0];
	}
    vector<int> qi;
    qi.push_back(t);
	for(int i=1;i<=k;i++)
	{
		int xi;
		scanf("%d",&xi);
		qi.push_back(xi);
		if(!dao.count(xi))
		{
			dao[xi]=0;
		}
		dao[xi]++;
	}
	cache.push(qi);
	printf("%ld\n",dao.size());
}
int main()
{
	
	scanf("%d",&n);
	while(n--)
	{
		solve();
	}
}