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First solution in Clear category for Pearls in the Box by tarasenkoa
def checkio(m, step):
p = m.count("w") / len(m)
for i in range(1,step):
p = (p - 1/len(m))*p + (p + 1/len(m))*(1-p)
return round(p,2)
June 22, 2015
