Problem 604. Next lexicographic - permutation

Created by Muthu Annamalai

Solve Later

{"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>Find next lexicographic - permutation (permutations as it would occur in a dictionary order).</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>E.g: nextP('ABCD') = ABDC</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>If you can generate the next permutation, then you can also generate a 'cycle' of all permutations using a construct like,</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[     cycle = +1;\n     curr = start;\n     while ( true )         \n         curr = nextP(curr);\n         if ( curr == start )\n             break;\n         end\n         cycle = cycle+1;\n     end]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>For fun, you could generate all the n! permutations of a, unique n-letter string.</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>"}]}

Solve

Solution Stats

88 Solutions
19 Solvers

Last Solution submitted on Nov 14, 2020

Last 200 Solutions

Problem Comments

Solution Comments

Solution 1681640

1 Comment

1 Comment

cokakola on 27 Nov 2018

I have the impression, that the testcase is broken.
My solution runs fine on my computer and fails in Cody.
It even does not give an output (which I usualy get in all other problems). The simple testfunction
function next = nextP(curr)
disp(curr);
next=curr;
end
Does not give an output too. What is the issue? How can I get the thing working?
Thanks for any reply ;-)

Solution 80004

1 Comment

1 Comment

Venu Lolla on 21 Apr 2012

@bmtran, thanks for the improvement :D.

Problem Recent Solvers19

Problem Tags

combinatorics permutations

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Problem 604. Next lexicographic - permutation

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers19

Suggested Problems

More from this Author10

Problem Tags

Community Treasure Hunt

Problem 604. Next lexicographic - permutation

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers19

Suggested Problems

More from this Author10

Problem Tags

Community Treasure Hunt

Players