ile_grubych, ile_ciastek = map(int,input().split())
doba = 86400
zjedzone = 0
for i in range(ile_grubych):
zjedzone += doba // int(input())
pudelka = zjedzone // ile_ciastek
if pudelka * ile_ciastek >= zjedzone:
print(pudelka)
else:
print(pudelka+1)
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