def hamming (a,b):
  return map(lambda x,y:
    x==y and 1 or 0, a,b).count(1)

a=(0,1,0,1,0,1,1,1,0,1)
b=(1,0,0,1,0,0,1,1,1,0)

print hamming(a,b)
# 5
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def horner (a,x):
  b=0
  for ak in a: b=b*x+ak
  return b
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def sommacoseni (a,x):
  a.reverse(); ix=x*1j
  z1=cmath.exp(ix); z2=cmath.exp(-ix)
  return (horner(a,z1)+horner(a,z2))/2

a=[2,3,0,4,7,1,3]

print sommacoseni(a,0.2)
# (14.7458647279+0j)