#include <iostream>
using namespace std;
 
int main()
{
 
	int day = 86400;
	int temp;
	int suma = 0;
	int t,ciasteczka;
	cin >> t;
	for (int j = 0; j < t; j++)
	{
		int n;
		cin >> n;
		int* obrzartuchy = new int[n];
		cin >> ciasteczka;
		suma = 0;
		for (int i = 0; i < n; i++)
		{
			cin >> obrzartuchy[i];
			suma += day/obrzartuchy[i];
 
		}
 
 
		temp = ciasteczka;
		ciasteczka = 0;
		int licznik = 0;
		while (ciasteczka <= suma)
		{
			ciasteczka += temp;
			licznik++;
			if (ciasteczka >= suma) break;
		}
		cout << licznik << endl;
 
		delete[]obrzartuchy;
	}
 
 
	return 0;
}

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MiAKMiAxMCAKMzYwMCAxODAwCjMgMzU2IAoxMjMgCjMyOTk5CjEwMTAxCg==

2 
2 10 
3600 1800
3 356 
123 
32999
10101