from math import pi,cos,sin,log ROOT = 3 roots = [cos(2*pi/2**i) + sin(2*pi/2**i)*1j for i in range(24)] iroots = [cos(2*pi/2**i) - sin(2*pi/2**i)*1j for i in range(24)] def untt(a,n): for i in range(n): m = 1<<(n-i-1) for s in range(1<