# Funksiyalar va chegaraviy testlar
# Faqat sintetik, lokal o‘quv misoli.

def valid_port(value):
    return type(value) is int and 1 <= value <= 65535

cases = [0, 1, 443, 65535, 65536, True]
print(sum(valid_port(value) for value in cases))
assert valid_port(443)
assert not valid_port(True)