{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2026-06-05T00:10:21.000Z","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":"2026-06-05T00:00:00.000Z","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":45234,"title":"Calculating large fibonacci numbers","description":"The fibonacci sequence starts 1,1,2,3,5,8...\r\n\r\nFind the the n'th fibonacci number. Then calculate round(log10( . )) of that n'th fibonacci number. ","description_html":"\u003cp\u003eThe fibonacci sequence starts 1,1,2,3,5,8...\u003c/p\u003e\u003cp\u003eFind the the n'th fibonacci number. Then calculate round(log10( . )) of that n'th fibonacci number.\u003c/p\u003e","function_template":"function y = your_fcn_name(n)\r\n  y = n;\r\nend","test_suite":"%%\r\nx = 100;\r\ny_correct = 21;\r\nassert(isequal(your_fcn_name(x),y_correct))\r\n\r\n%%\r\nx = 140;\r\ny_correct = 29;\r\nassert(isequal(your_fcn_name(x),y_correct))\r\n\r\n%%\r\nx = 200;\r\ny_correct = 41;\r\nassert(isequal(your_fcn_name(x),y_correct))\r\n\r\n%%\r\nx = 300;\r\ny_correct = 62;\r\nassert(isequal(your_fcn_name(x),y_correct))\r\n\r\n%%\r\nx = 400;\r\ny_correct = 83;\r\nassert(isequal(your_fcn_name(x),y_correct))\r\n%%\r\n\r\nx = 500;\r\ny_correct = 104;\r\nassert(isequal(your_fcn_name(x),y_correct))\r\n%%\r\n\r\nx = 1000;\r\ny_correct = 209;\r\nassert(isequal(your_fcn_name(x),y_correct))\r\n\r\n%%\r\nx = 1100;\r\ny_correct = 230;\r\nassert(isequal(your_fcn_name(x),y_correct))\r\n\r\n%%\r\nx = 1100;\r\ny_correct = 230;\r\ntic\r\nassert(isequal(your_fcn_name(x),y_correct))\r\ntime = toc\r\nassert(time \u003c .01)","published":true,"deleted":false,"likes_count":2,"comments_count":0,"created_by":65480,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":27,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2019-12-14T00:30:26.000Z","updated_at":"2026-05-30T02:36:23.000Z","published_at":"2019-12-14T00:30:26.000Z","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\u003eThe fibonacci sequence starts 1,1,2,3,5,8...\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eFind the the n'th fibonacci number. Then calculate round(log10( . )) of that n'th fibonacci number.\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":45234,"title":"Calculating large fibonacci numbers","description":"The fibonacci sequence starts 1,1,2,3,5,8...\r\n\r\nFind the the n'th fibonacci number. Then calculate round(log10( . )) of that n'th fibonacci number. ","description_html":"\u003cp\u003eThe fibonacci sequence starts 1,1,2,3,5,8...\u003c/p\u003e\u003cp\u003eFind the the n'th fibonacci number. Then calculate round(log10( . )) of that n'th fibonacci number.\u003c/p\u003e","function_template":"function y = your_fcn_name(n)\r\n  y = n;\r\nend","test_suite":"%%\r\nx = 100;\r\ny_correct = 21;\r\nassert(isequal(your_fcn_name(x),y_correct))\r\n\r\n%%\r\nx = 140;\r\ny_correct = 29;\r\nassert(isequal(your_fcn_name(x),y_correct))\r\n\r\n%%\r\nx = 200;\r\ny_correct = 41;\r\nassert(isequal(your_fcn_name(x),y_correct))\r\n\r\n%%\r\nx = 300;\r\ny_correct = 62;\r\nassert(isequal(your_fcn_name(x),y_correct))\r\n\r\n%%\r\nx = 400;\r\ny_correct = 83;\r\nassert(isequal(your_fcn_name(x),y_correct))\r\n%%\r\n\r\nx = 500;\r\ny_correct = 104;\r\nassert(isequal(your_fcn_name(x),y_correct))\r\n%%\r\n\r\nx = 1000;\r\ny_correct = 209;\r\nassert(isequal(your_fcn_name(x),y_correct))\r\n\r\n%%\r\nx = 1100;\r\ny_correct = 230;\r\nassert(isequal(your_fcn_name(x),y_correct))\r\n\r\n%%\r\nx = 1100;\r\ny_correct = 230;\r\ntic\r\nassert(isequal(your_fcn_name(x),y_correct))\r\ntime = toc\r\nassert(time \u003c .01)","published":true,"deleted":false,"likes_count":2,"comments_count":0,"created_by":65480,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":27,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2019-12-14T00:30:26.000Z","updated_at":"2026-05-30T02:36:23.000Z","published_at":"2019-12-14T00:30:26.000Z","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\u003eThe fibonacci sequence starts 1,1,2,3,5,8...\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eFind the the n'th fibonacci number. 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