{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2026-08-24T00:15:41.000Z","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":"2026-08-24T00:00:00.000Z","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":45321,"title":"Kolakoski Sequence","description":"This is a modified version of the kolakoski sequence. \r\n\r\n\r\nRefer to the problem \u003chttps://www.mathworks.com/matlabcentral/cody/problems/2371\u003e for the original one.\r\n\r\nfor this case,\r\n\r\n\r\nGiven a particular initial vector a and length x,\r\ngenerate the kolakoski sequence (first x terms) from that vector.\r\n\r\n\r\nFor example if a=[2,1] and x=10 ;  the sequence would look like --\r\n\r\n\r\n 2     2     1     1     2     1     2     2     1     2     2","description_html":"\u003cp\u003eThis is a modified version of the kolakoski sequence.\u003c/p\u003e\u003cp\u003eRefer to the problem \u003ca href = \"https://www.mathworks.com/matlabcentral/cody/problems/2371\"\u003ehttps://www.mathworks.com/matlabcentral/cody/problems/2371\u003c/a\u003e for the original one.\u003c/p\u003e\u003cp\u003efor this case,\u003c/p\u003e\u003cp\u003eGiven a particular initial vector a and length x,\r\ngenerate the kolakoski sequence (first x terms) from that vector.\u003c/p\u003e\u003cp\u003eFor example if a=[2,1] and x=10 ;  the sequence would look like --\u003c/p\u003e\u003cpre\u003e 2     2     1     1     2     1     2     2     1     2     2\u003c/pre\u003e","function_template":"function y = kolakoski_seq_3(a,x)\r\n  y = x;\r\nend","test_suite":"%%\r\na = [2,1];\r\nx=10;\r\ny_correct = [2     2     1     1     2     1     2     2     1     2  ];\r\nassert(isequal( kolakoski_seq_3(a,x),y_correct))\r\n%%\r\na = [2,1];\r\nx=15;\r\ny_correct = [2     2     1     1     2     1     2     2     1     2     2  1  1     2     1 ];\r\nassert(isequal( kolakoski_seq_3(a,x),y_correct))\r\n%%\r\na = [1,3,1,2];\r\nx=30;\r\ny_correct = [1, 3, 3, 3, 1, 1, 1, 2, 2, 2, 1, 3, 1, 2, 2, 1, 1, 3, 3, 1, 2, 2, 2, 1, 3, 3, 1, 1, 2, 1];\r\nassert(isequal( kolakoski_seq_3(a,x),y_correct))\r\n%%\r\na = [4,2];\r\nx=15;\r\ny_correct = [ 4     4     4     4     2     2     2     2     4     4     4     4  2     2     2];\r\nassert(isequal( kolakoski_seq_3(a,x),y_correct))\r\n%%\r\na = [1,3,2];\r\nx=15;\r\ny_correct = [1     3     3     3     2     2     2     1     1     1     3     3 2     2     1];\r\nassert(isequal( kolakoski_seq_3(a,x),y_correct))\r\n%%\r\na = [1,3,2,1];\r\nx=30;\r\ny_correct = [1, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 3, 3, 2, 2, 1, 1, 3, 2, 1, 1, 1, 1, 3, 3, 3, 2, 2, 1];\r\nassert(isequal( kolakoski_seq_3(a,x),y_correct))\r\n%%\r\na = [3,12,1,5];\r\nx=40;\r\ny_correct = [3     3     3    12    12    12     1     1     1     5     5     5     5     5     5     5     5 5     5     5     5     3     3     3     3     3     3     3     3     3     3     3     3    12 12    12    12    12    12    12];\r\nassert(isequal( kolakoski_seq_3(a,x),y_correct))","published":true,"deleted":false,"likes_count":2,"comments_count":5,"created_by":363598,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":18,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2020-02-11T22:04:19.000Z","updated_at":"2026-05-24T22:25:56.000Z","published_at":"2020-02-11T22:17:59.000Z","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\",\"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\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\\n\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\u003eThis is a modified version of the kolakoski sequence.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eRefer to the problem\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"https://www.mathworks.com/matlabcentral/cody/problems/2371\\\"\u003e\u003cw:r\u003e\u003cw:t\u003e\u0026lt;https://www.mathworks.com/matlabcentral/cody/problems/2371\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e\u0026gt; for the original one.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003efor this case,\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eGiven a particular initial vector a and length x, generate the kolakoski sequence (first x terms) from that vector.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eFor example if a=[2,1] and x=10 ; the sequence would look like --\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"code\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e\u003c![CDATA[ 2     2     1     1     2     1     2     2     1     2     2]]\u003e\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":45321,"title":"Kolakoski Sequence","description":"This is a modified version of the kolakoski sequence. \r\n\r\n\r\nRefer to the problem \u003chttps://www.mathworks.com/matlabcentral/cody/problems/2371\u003e for the original one.\r\n\r\nfor this case,\r\n\r\n\r\nGiven a particular initial vector a and length x,\r\ngenerate the kolakoski sequence (first x terms) from that vector.\r\n\r\n\r\nFor example if a=[2,1] and x=10 ;  the sequence would look like --\r\n\r\n\r\n 2     2     1     1     2     1     2     2     1     2     2","description_html":"\u003cp\u003eThis is a modified version of the kolakoski sequence.\u003c/p\u003e\u003cp\u003eRefer to the problem \u003ca href = \"https://www.mathworks.com/matlabcentral/cody/problems/2371\"\u003ehttps://www.mathworks.com/matlabcentral/cody/problems/2371\u003c/a\u003e for the original one.\u003c/p\u003e\u003cp\u003efor this case,\u003c/p\u003e\u003cp\u003eGiven a particular initial vector a and length x,\r\ngenerate the kolakoski sequence (first x terms) from that vector.\u003c/p\u003e\u003cp\u003eFor example if a=[2,1] and x=10 ;  the sequence would look like --\u003c/p\u003e\u003cpre\u003e 2     2     1     1     2     1     2     2     1     2     2\u003c/pre\u003e","function_template":"function y = kolakoski_seq_3(a,x)\r\n  y = x;\r\nend","test_suite":"%%\r\na = [2,1];\r\nx=10;\r\ny_correct = [2     2     1     1     2     1     2     2     1     2  ];\r\nassert(isequal( kolakoski_seq_3(a,x),y_correct))\r\n%%\r\na = [2,1];\r\nx=15;\r\ny_correct = [2     2     1     1     2     1     2     2     1     2     2  1  1     2     1 ];\r\nassert(isequal( kolakoski_seq_3(a,x),y_correct))\r\n%%\r\na = [1,3,1,2];\r\nx=30;\r\ny_correct = [1, 3, 3, 3, 1, 1, 1, 2, 2, 2, 1, 3, 1, 2, 2, 1, 1, 3, 3, 1, 2, 2, 2, 1, 3, 3, 1, 1, 2, 1];\r\nassert(isequal( kolakoski_seq_3(a,x),y_correct))\r\n%%\r\na = [4,2];\r\nx=15;\r\ny_correct = [ 4     4     4     4     2     2     2     2     4     4     4     4  2     2     2];\r\nassert(isequal( kolakoski_seq_3(a,x),y_correct))\r\n%%\r\na = [1,3,2];\r\nx=15;\r\ny_correct = [1     3     3     3     2     2     2     1     1     1     3     3 2     2     1];\r\nassert(isequal( kolakoski_seq_3(a,x),y_correct))\r\n%%\r\na = [1,3,2,1];\r\nx=30;\r\ny_correct = [1, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 3, 3, 2, 2, 1, 1, 3, 2, 1, 1, 1, 1, 3, 3, 3, 2, 2, 1];\r\nassert(isequal( kolakoski_seq_3(a,x),y_correct))\r\n%%\r\na = [3,12,1,5];\r\nx=40;\r\ny_correct = [3     3     3    12    12    12     1     1     1     5     5     5     5     5     5     5     5 5     5     5     5     3     3     3     3     3     3     3     3     3     3     3     3    12 12    12    12    12    12    12];\r\nassert(isequal( kolakoski_seq_3(a,x),y_correct))","published":true,"deleted":false,"likes_count":2,"comments_count":5,"created_by":363598,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":18,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2020-02-11T22:04:19.000Z","updated_at":"2026-05-24T22:25:56.000Z","published_at":"2020-02-11T22:17:59.000Z","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\",\"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\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\\n\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\u003eThis is a modified version of the kolakoski sequence.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eRefer to the problem\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:hyperlink w:docLocation=\\\"https://www.mathworks.com/matlabcentral/cody/problems/2371\\\"\u003e\u003cw:r\u003e\u003cw:t\u003e\u0026lt;https://www.mathworks.com/matlabcentral/cody/problems/2371\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e\u0026gt; for the original one.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003efor this case,\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eGiven a particular initial vector a and length x, generate the kolakoski sequence (first x terms) from that vector.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eFor example if a=[2,1] and x=10 ; the sequence would look like --\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"code\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e\u003c![CDATA[ 2     2     1     1     2     1     2     2     1     2     2]]\u003e\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":"Algorithm I","count":1,"selected":false}],[{"value":"medium","count":1,"selected":false}]],"term":"tag:\"kolakoski\"","page":1,"per_page":50,"sort":"map(difficulty_value,0,0,999) asc"}}