{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2025-12-14T01:33:56.000Z","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":"2025-12-14T00:00:00.000Z","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":2268,"title":"Given a number between 1-365 (a day number in a non leap year) , find what day of what month it is.","description":"For a given number between 1-365 (a day number in a non leap year), you should check which day of which month it is.\r\nfor example,\r\nn=35 should give back 4 Feb.","description_html":"\u003cdiv style = \"text-align: start; line-height: 20.4333px; min-height: 0px; white-space: normal; color: rgb(0, 0, 0); font-family: Menlo, Monaco, Consolas, monospace; font-style: normal; font-size: 14px; font-weight: 400; text-decoration: rgb(0, 0, 0); white-space: normal; \"\u003e\u003cdiv style=\"block-size: 81px; display: block; min-width: 0px; padding-block-start: 0px; padding-top: 0px; perspective-origin: 407px 40.5px; transform-origin: 407px 40.5px; vertical-align: baseline; \"\u003e\u003cdiv style=\"block-size: 21px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; perspective-origin: 384px 10.5px; text-align: left; transform-origin: 384px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; margin-right: 10px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; 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unicode-bidi: normal; \"\u003e\u003cspan style=\"\"\u003en=35 should give back 4 Feb.\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003c/div\u003e\u003c/div\u003e","function_template":"function y = day(n)\r\n  \r\nend","test_suite":"%%\r\nn = 1;\r\ny_correct ='1 Jan';\r\nassert(isequal(day(n),y_correct))\r\n%%\r\nn = 35;\r\ny_correct ='4 Feb';\r\nassert(isequal(day(n),y_correct))\r\n%%\r\nn = 82;\r\ny_correct ='23 Mar';\r\nassert(isequal(day(n),y_correct))\r\n%%\r\nn = 365;\r\ny_correct ='31 Dec';\r\nassert(isequal(day(n),y_correct))\r\n%%\r\nn = 360;\r\ny_correct ='26 Dec';\r\nassert(isequal(day(n),y_correct))","published":true,"deleted":false,"likes_count":2,"comments_count":2,"created_by":24961,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":33,"test_suite_updated_at":"2021-09-15T07:04:28.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2014-04-05T11:49:52.000Z","updated_at":"2025-11-21T18:04:56.000Z","published_at":"2014-04-05T12:01:28.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"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\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eFor a given number between 1-365 (a day number in a non leap year), you should check which day of which month it is.\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\u003efor example,\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\u003en=35 should give back 4 Feb.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\",\"relationship\":null}],\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"target\":\"/matlab/document.xml\",\"relationshipId\":\"rId1\"}]}"},{"id":42352,"title":"Days until next NewYear ball drop","description":"Given a date string in the form 'yyyy-mm-dd' or 'yyyy-mm-dd hh:mm:ss', calculate the number of *days* until the dropping of the NewYear ball at Times Square (i.e., Dec 31st at midnight) of that year. Examples:\r\n\r\n    y = Days2NYE('2014-05-26') = 220 or\r\n    y = Days2NYE('2014-05-26 10:15:45') = 219","description_html":"\u003cp\u003eGiven a date string in the form 'yyyy-mm-dd' or 'yyyy-mm-dd hh:mm:ss', calculate the number of \u003cb\u003edays\u003c/b\u003e until the dropping of the NewYear ball at Times Square (i.e., Dec 31st at midnight) of that year. 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Examples:\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[    y = Days2NYE('2014-05-26') = 220 or\\n    y = Days2NYE('2014-05-26 10:15:45') = 219]]\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\"}]}"},{"id":45207,"title":"Calculate days until Christmas","description":"Provided with inputs year, month, day e.g. 2019,11,12, calculate the number of days until the next Christmas day, i.e. the next time it will be December 25","description_html":"\u003cp\u003eProvided with inputs year, month, day e.g. 2019,11,12, calculate the number of days until the next Christmas day, i.e. the next time it will be December 25\u003c/p\u003e","function_template":"function num = daysUntilChristmas(y,m,d)\r\n  num = 0;\r\nend","test_suite":"%%\r\nassert(isequal(daysUntilChristmas(2019,11,19),36))\r\n%%\r\nassert(isequal(daysUntilChristmas(2018,12,28),362))\r\n%%\r\nassert(isequal(daysUntilChristmas(2019,01,01),358))\r\n%%\r\nassert(isequal(daysUntilChristmas(2019,12,30),361))","published":true,"deleted":false,"likes_count":4,"comments_count":0,"created_by":348097,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":350,"test_suite_updated_at":"2019-11-19T16:17:03.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2019-11-19T16:06:18.000Z","updated_at":"2026-04-01T08:10:22.000Z","published_at":"2019-11-19T16:17:03.000Z","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\u003eProvided with inputs year, month, day e.g. 2019,11,12, calculate the number of days until the next Christmas day, i.e. the next time it will be December 25\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":{"errors":[],"problems":[{"id":2268,"title":"Given a number between 1-365 (a day number in a non leap year) , find what day of what month it is.","description":"For a given number between 1-365 (a day number in a non leap year), you should check which day of which month it is.\r\nfor example,\r\nn=35 should give back 4 Feb.","description_html":"\u003cdiv style = \"text-align: start; 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Examples:\u003c/p\u003e\u003cpre\u003e    y = Days2NYE('2014-05-26') = 220 or\r\n    y = Days2NYE('2014-05-26 10:15:45') = 219\u003c/pre\u003e","function_template":"function y = Days2NYE(x)\r\n  y = ??;\r\nend","test_suite":"%%\r\nx= '2015-05-26';\r\ny_correct = 220;\r\nassert(isequal(Days2NYE(x),y_correct))\r\n\r\n%%\r\nx = '2015-12-30';\r\ny_correct = 2;\r\nassert(isequal(Days2NYE(x),y_correct))\r\n\r\n%%\r\nx = '2014-05-26 10:15:45';\r\ny_correct = 219;\r\nassert(isequal(Days2NYE(x),y_correct))\r\n\r\n%%\r\nx = '2014-12-31 10:15:45';\r\ny_correct = 0;\r\nassert(isequal(Days2NYE(x),y_correct))","published":true,"deleted":false,"likes_count":2,"comments_count":0,"created_by":44306,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":78,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2015-06-02T18:07:53.000Z","updated_at":"2026-03-22T08:23:49.000Z","published_at":"2015-06-02T18:09:23.000Z","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\u003eGiven a date string in the form 'yyyy-mm-dd' or 'yyyy-mm-dd hh:mm:ss', calculate the number of\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e \u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:rPr\u003e\u003cw:b/\u003e\u003c/w:rPr\u003e\u003cw:t\u003edays\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e until the dropping of the NewYear ball at Times Square (i.e., Dec 31st at midnight) of that year. Examples:\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[    y = Days2NYE('2014-05-26') = 220 or\\n    y = Days2NYE('2014-05-26 10:15:45') = 219]]\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\"}]}"},{"id":45207,"title":"Calculate days until Christmas","description":"Provided with inputs year, month, 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