#include <iostream>
#include <math.h>
using namespace std;
int testy, ile_zawodnikow, czas_jedzenia, doba=86400, ciastek_na_dobe, suma_paczkow;
double pudelka, ciastek_w_pudelku;
int main()
{
cin>>testy;
for(int i=1; i<=testy; i++)
{
cin>>ile_zawodnikow>>ciastek_w_pudelku;
for (int j=1; j<=ile_zawodnikow; j++)
{
cin>>czas_jedzenia;
ciastek_na_dobe = doba/czas_jedzenia;
if(ciastek_na_dobe<1)
{
ciastek_na_dobe+=1;
}
suma_paczkow = suma_paczkow + ciastek_na_dobe;
pudelka = suma_paczkow/ciastek_w_pudelku;
pudelka = ceil(pudelka);
}
suma_paczkow=0;
cout<< pudelka<<endl;
}
return 0;
}
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