#include <iostream>
 
using namespace std;
 
int ile, losob, lciastek, wynik, lsek, suma;
 
 
int main()
{
    cin >> ile;
 
    for (int i=0; i<ile; i++)
    {
        suma=0;
        cin >> losob;
        cin >> lciastek;
 
        for (int i=1; i<=losob; i++)
         {
 
            wynik=0;
            cin >> lsek;
            if (lsek<=86400) {wynik+=(86400/lsek);}
            else  {wynik+=0;}
            suma+=wynik;
 
         }
 
         suma/=lciastek;
 
         if (suma%lciastek!=0)
         {
            suma+=1;
         }
 
         cout << suma << endl;
    }
 
 
    return 0;
}
 

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3
10 123
86500
31232
4342
55
32
566
999
28781
4431
82999
4 45
213
546
3212
2
4 35
81998
21
2123
82999