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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def integratedAutocorrelationTime(A_n, B_n=None, fast=False, mintime=3):
 """Estimate the integrated autocorrelation time. See Also -------- statisticalInefficiency """


    g = statisticalInefficiency(A_n, B_n, fast, mintime)
    tau = (g - 1.0) / 2.0
    return tau