Problem 1900. GJam 2014 China Rd A: Rational Number Tree (Large Values)

Created by Richard Zapor

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This Challenge is derived from <a href = "http://code.google.com/codejam/contest/2924486/dashboard#s=p1">GJam 2014 China Rational Number Tree</a>.The Goal is to determine the tree node if given [P,Q] or provide the [P,Q] if given a node. This is the Large Challenge with a Max of 64 Tree levels. Processing of uint64 size data requires extra care.Consider an infinite complete binary tree where the root node is 1/1 and the left and right children of node P/Q are P/(P+Q) and (P+Q)/Q, respectively.The Tree looks like:<pre> 1/1
 ______|______
 | |
 1/2 2/1
 ___|___ ___|___
 | | | |
1/3 3/2 2/3 3/1</pre>The nodes are 1/1, 1/2, 2/1, 1/3, 3/2, 2/3, 3/1,...Input: [N] or [P,Q] where N is a uint64 integer node or [P,Q] (double) are terms of a NodeOutput: [P,Q](double) or [N](uint64) depends on Input typeExamples:<pre class="language-matlab">[Input] [Output]
 [2] [1 2]
 [1 2] [2]
 [5] [3 2]
 [3 2] [5]
</pre>Contest Performance: Best Delta Time of 14 minutes with only 368 able to process the large data set in less than 3 hours.Notes:1) Matlab has issues with uint64 for dec2bin and matrix multiplies.2) Example of uint64 read is provided in test suite comments3) Bitshift and bitget work on uint64

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Last Solution submitted on Dec 17, 2018

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yurenchu on 8 Jun 2017

I'm relatively new to Cody; can anyone please tell me, why does this solution of mine not appear in the Solution List?

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Problem 1900. GJam 2014 China Rd A: Rational Number Tree (Large Values)

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Problem 1900. GJam 2014 China Rd A: Rational Number Tree (Large Values)

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