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coefficients) res = [] # Separate the signal into even and odd terms even_terms = signal[::2] odd_terms = signal[1::2] # Recursively compute FFT for even and odd terms f1 = nice_fft(even_terms) f2 = nice_fft(odd_terms) # Combine the results using the Cooley-Tukey FFT algorithm for k in range(N): #