Problem 44348. Seemingly impossible problem

Created by David Verrelli

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>This is a</w:t></w:r><w:r><w:t> </w:t></w:r><w:r><w:rPr><w:i/></w:rPr><w:t>seemingly</w:t></w:r><w:r><w:t> 'impossible' problem, because variously your function, \"impossibleFn\", must return an output of either 1 or 2 or 3 for the same input (0, the number zero). Why is this described as \"seemingly impossible\"? Because it does not satisfy the</w:t></w:r><w:r><w:t> </w:t></w:r><w:r><w:rPr><w:i/></w:rPr><w:t>mathematical</w:t></w:r><w:r><w:t> definition of a function. Yet there is still</w:t></w:r><w:r><w:t> </w:t></w:r><w:r><w:rPr><w:i/></w:rPr><w:t>at least</w:t></w:r><w:r><w:t> one way to pass all the tests! (One simple code has been verified to work. However, all's fair in this problem, so try whichever hacks and workarounds are at your disposal.) UPDATE: Now</w:t></w:r><w:r><w:t> </w:t></w:r><w:r><w:rPr><w:i/></w:rPr><w:t>more than three</w:t></w:r><w:r><w:t> (unrelated) approaches have been verified to pass all the tests.</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

279 Solutions
24 Solvers

Last Solution submitted on Jan 28, 2023

Last 200 Solutions

Problem Comments

2 Comments

2 Comments

Jean-Marie Sainthillier on 9 Mar 2018

Add more tests, for example:
Test1 : 0->1
Test2: 1->1
Test3: 0->2
Test4: 6->6
Test 6: 0->0
...

David Verrelli on 10 Mar 2018

Hello, Jean-Marie Sainthillier. Thanks for the suggestion. If I understand you correctly, that could be done, but it would break all/most of the previous submissions, so it seems better to do that in a separate problem — if you would like to make one. —DIV

Solution Comments

Show comments

Problem Recent Solvers24

Problem Tags

Community Treasure Hunt

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

Start Hunting!

Problem 44348. Seemingly impossible problem

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers24

Suggested Problems

More from this Author32

Problem Tags

Community Treasure Hunt

Problem 44348. Seemingly impossible problem

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers24

Suggested Problems

More from this Author32

Problem Tags

Community Treasure Hunt

Players