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Design/Analysis Algorithm  RSS feed

 
Greenhorn
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Convert mystery_recursive into a linear-time dynamic programming algorithm mystery_iterative using a loop (rather than memoized recursion) in Python. (This code is not solving any particularly interesting problem; it’s just an example.)

def mystery_recursive(x): if len(x) == 0: return 1
if len(x) == 1: return x[0]
return max(mystery_recursive(x[:-1]) + len(x), mystery_recursive(x[:-2]) + x[-1] * x[-2])
 
Marshal
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Welcome to the Ranch

I shall copy this post into another forum so as to give you more exposure.
 
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What is your question? Can't you create a dictionary((0,1), (1, x[0]), and calculate the function values for n = 2 to whatever, using the dictionary and the given recursion , updating the dictionary as you go?
 
Davin Thomas
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Thanks for all of the help Marshall Ritchie but, problem solved. Eh.
 
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