def is_even(n: int) -> bool:
if n == 1:
return False
if n == 0:
return True
return is_even(n-2)
def is_even(n: int) -> bool:
return n % 2 == 0
def is_even(n: int) -> bool:
return n & 1 == 0
def is_even(n: int) -> bool:
return [True, False][n % 2]