{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2026-05-26T00:16:20.000Z","description":"Problems submitted by members of the MATLAB Central community.","is_default":true,"created_by":161519,"badge_id":null,"featured":false,"trending":false,"solution_count_in_trending_period":0,"trending_last_calculated":"2026-05-26T00:00:00.000Z","image_id":null,"published":true,"community_created":false,"status_id":2,"is_default_group_for_player":false,"deleted_by":null,"deleted_at":null,"restored_by":null,"restored_at":null,"description_opc":null,"description_html":null,"published_at":null},"problems":[{"id":42506,"title":"Who am I ?","description":"Who am I ? Write any function that reveals itself under these constraints.\r\nHint: I am combinatorial code, and I don't like states.\r\nHint: Under free invocation I yield a default, half of a centum.\r\nHint: Under forced invocation I reveal steps to \\infinity.\r\n\r\n","description_html":"\u003cp\u003eWho am I ? Write any function that reveals itself under these constraints.\r\nHint: I am combinatorial code, and I don't like states.\r\nHint: Under free invocation I yield a default, half of a centum.\r\nHint: Under forced invocation I reveal steps to \\infinity.\u003c/p\u003e","function_template":"function y = fcn (varargin)\r\n   if nargin \u003c 1\r\n     y = %FIXME\r\n   else \r\n     y = %AND ME TOO!\r\n   end\r\nend\r\n\r\n","test_suite":"%%\r\nassert(isequal(fcn(fcn()),-1+0.5*fcn()))\r\nassert(isequal(fcn(fcn(fcn())),10))\r\nassert(isequal((fcn(fcn(fcn(fcn())))),6))\r\nassert(isequal(fcn(fcn(fcn(fcn(fcn())))),8))\r\nassert(isequal(fcn(fcn(fcn(fcn(fcn(fcn()))))),3))","published":true,"deleted":false,"likes_count":0,"comments_count":0,"created_by":3378,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":15,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2015-08-14T03:51:19.000Z","updated_at":"2026-05-28T13:39:24.000Z","published_at":"2015-08-14T03:51:36.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eWho am I ? Write any function that reveals itself under these constraints. Hint: I am combinatorial code, and I don't like states. Hint: Under free invocation I yield a default, half of a centum. Hint: Under forced invocation I reveal steps to \\\\infinity.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"}],"problem_search":{"problems":[{"id":42506,"title":"Who am I ?","description":"Who am I ? Write any function that reveals itself under these constraints.\r\nHint: I am combinatorial code, and I don't like states.\r\nHint: Under free invocation I yield a default, half of a centum.\r\nHint: Under forced invocation I reveal steps to \\infinity.\r\n\r\n","description_html":"\u003cp\u003eWho am I ? Write any function that reveals itself under these constraints.\r\nHint: I am combinatorial code, and I don't like states.\r\nHint: Under free invocation I yield a default, half of a centum.\r\nHint: Under forced invocation I reveal steps to \\infinity.\u003c/p\u003e","function_template":"function y = fcn (varargin)\r\n   if nargin \u003c 1\r\n     y = %FIXME\r\n   else \r\n     y = %AND ME TOO!\r\n   end\r\nend\r\n\r\n","test_suite":"%%\r\nassert(isequal(fcn(fcn()),-1+0.5*fcn()))\r\nassert(isequal(fcn(fcn(fcn())),10))\r\nassert(isequal((fcn(fcn(fcn(fcn())))),6))\r\nassert(isequal(fcn(fcn(fcn(fcn(fcn())))),8))\r\nassert(isequal(fcn(fcn(fcn(fcn(fcn(fcn()))))),3))","published":true,"deleted":false,"likes_count":0,"comments_count":0,"created_by":3378,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":15,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2015-08-14T03:51:19.000Z","updated_at":"2026-05-28T13:39:24.000Z","published_at":"2015-08-14T03:51:36.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eWho am I ? Write any function that reveals itself under these constraints. Hint: I am combinatorial code, and I don't like states. Hint: Under free invocation I yield a default, half of a centum. Hint: Under forced invocation I reveal steps to \\\\infinity.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"}],"errors":[],"facets":[[],[{"value":"medium","count":1,"selected":false}]],"term":"tag:\"whoami\"","page":1,"per_page":50,"sort":"map(difficulty_value,0,0,999) asc"}}