Problem 1731. Text File Read: 64 bit data set

Created by Richard Zapor

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{"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","targetMode":"","relationshipId":"rId1","target":"/matlab/document.xml"},{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/output","targetMode":"","relationshipId":"rId2","target":"/matlab/output.xml"}],"parts":[{"partUri":"/matlab/document.xml","relationship":[],"contentType":"application/vnd.mathworks.matlab.code.document+xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<w:document xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\"><w:body><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>This Challenge is to read a text file that has vary large integers up to 2e18, typical for</w:t></w:r><w:r><w:t> </w:t></w:r><w:hyperlink w:docLocation=\"http://code.google.com/codejam/contests.html\"><w:r><w:t>Google Code Jam</w:t></w:r></w:hyperlink><w:r><w:t>. These values are well within the bounds of uint64.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>The data is an array of Q pairs.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:rPr><w:b/></w:rPr><w:t>Input:</w:t></w:r><w:r><w:t> [Q, fname] The number of lines in the file and its filename.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:rPr><w:b/></w:rPr><w:t>Output:</w:t></w:r><w:r><w:t> M a uint64 matrix of size(Q,2)</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:rPr><w:b/></w:rPr><w:t>Example:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[Input: {4, 'Cody_64.txt']\nThe text file:\n308436464205151562 1850618785230909388\n373665302816212423 1494661211264849698\n760961177192651897 1521922354385303795\n1 2000000000000000000\n\nOuput: A uint64 (4,2) matrix to full precision.]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:rPr><w:b/></w:rPr><w:t>Note of Warning:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>The fscanf function with %ul may not succeed, as of 7/20/2013.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>The result window has a case showing the function output</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:rPr><w:b/></w:rPr><w:t>Related Challenges:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[1) Bullseye Large Numbers r<1E18, P<2E18\n2) Super Large Numbers >2^64 (Java BigInteger methods)]]></w:t></w:r></w:p></w:body></w:document>"},{"partUri":"/matlab/output.xml","contentType":"text/xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\" ?><embeddedOutputs><metaData><evaluationState>manual</evaluationState><layoutState>code</layoutState><outputStatus>ready</outputStatus></metaData><outputArray type=\"array\"/><regionArray type=\"array\"/></embeddedOutputs>"}]}

This Challenge is to read a text file that has vary large integers up to 2e18, typical for <a href = "http://code.google.com/codejam/contests.html">Google Code Jam</a>. These values are well within the bounds of uint64.The data is an array of Q pairs.Input: [Q, fname] The number of lines in the file and its filename.Output: M a uint64 matrix of size(Q,2)Example:<pre class="language-matlab">Input: {4, 'Cody_64.txt']
The text file:
308436464205151562 1850618785230909388
373665302816212423 1494661211264849698
760961177192651897 1521922354385303795
1 2000000000000000000
</pre><pre class="language-matlab">Ouput: A uint64 (4,2) matrix to full precision.
</pre>Note of Warning:The fscanf function with %ul may not succeed, as of 7/20/2013.The result window has a case showing the function outputRelated Challenges:<pre class="language-matlab">1) Bullseye Large Numbers r&lt;1E18, P&lt;2E18
2) Super Large Numbers >2^64 (Java BigInteger methods)
</pre>

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36 Solutions
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Last Solution submitted on Jun 21, 2021

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Solution 286930

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3 Comments

Richard Zapor on 22 Jul 2013

Nice find in sscanf.

J.R.! Menzinger on 23 Jul 2013

;-)

J.R.! Menzinger on 23 Jul 2013

I used to read very much on Matlab's help, but since I play Cody, I read it a lot of times MORE!!! :-D

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%u64 cell array char fopen fscanf str2num textscan uint64 ul

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Problem 1731. Text File Read: 64 bit data set

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Problem 1731. Text File Read: 64 bit data set

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