def paarisarv(x):
  if x%2==0:
    return 1
  else:
    return 0

print paarisarv(4)
print filter(paarisarv, range(10))
print map(paarisarv, range(10))



#------------väljund --------------
# 1
# [0, 2, 4, 6, 8]
# [1, 0, 1, 0, 1, 0, 1, 0, 1, 0]