{"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":564,"title":"How to subtract?","description":"*\u0026plusmn \u0026plusmn \u0026plusmn \u0026plusmn \u0026plusmn \u0026plusmn \u0026plusmn \u0026plusmn \u0026plusmn \u0026plusmn \u0026plusmn* \r\n\r\n* Imagine you need to subtract one number from another using MATLAB.\r\n* You will not be using eval for this task.\r\n* Given two ASCII strings representing two integers X and Y.\r\n* Each of them has only 12 or less ASCII characters.\r\n* Each of them represents signed integers, such as '+2345'\r\n* Please output the result of (X-Y) in a similar style.","description_html":"\u003cp\u003e\u003cb\u003e\u0026plusmn \u0026plusmn \u0026plusmn \u0026plusmn \u0026plusmn \u0026plusmn \u0026plusmn \u0026plusmn \u0026plusmn \u0026plusmn \u0026plusmn\u003c/b\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003eImagine you need to subtract one number from another using MATLAB.\u003c/li\u003e\u003cli\u003eYou will not be using eval for this task.\u003c/li\u003e\u003cli\u003eGiven two ASCII strings representing two integers X and Y.\u003c/li\u003e\u003cli\u003eEach of them has only 12 or less ASCII characters.\u003c/li\u003e\u003cli\u003eEach of them represents signed integers, such as '+2345'\u003c/li\u003e\u003cli\u003ePlease output the result of (X-Y) in a similar style.\u003c/li\u003e\u003c/ul\u003e","function_template":"function Z = 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='+80';\r\nassert(isequal(mysub(X,Y),Z_correct))\r\n","published":true,"deleted":false,"likes_count":7,"comments_count":11,"created_by":166,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":1539,"test_suite_updated_at":"2017-10-16T20:04:25.000Z","rescore_all_solutions":false,"group_id":34,"created_at":"2012-04-08T02:27:39.000Z","updated_at":"2026-05-27T19:21:36.000Z","published_at":"2017-10-16T01:45:05.000Z","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:rPr\u003e\u003cw:b/\u003e\u003c/w:rPr\u003e\u003cw:t\u003e\u0026amp;plusmn \u0026amp;plusmn \u0026amp;plusmn \u0026amp;plusmn \u0026amp;plusmn \u0026amp;plusmn \u0026amp;plusmn \u0026amp;plusmn \u0026amp;plusmn \u0026amp;plusmn \u0026amp;plusmn\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eImagine you need to subtract one number from another using MATLAB.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle 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w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eEach of them represents signed integers, such as '+2345'\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003ePlease output the result of (X-Y) in a similar style.\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 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MATLAB.\u003c/li\u003e\u003cli\u003eYou will not be using eval for this task.\u003c/li\u003e\u003cli\u003eGiven two ASCII strings representing two integers X and Y.\u003c/li\u003e\u003cli\u003eEach of them has only 12 or less ASCII characters.\u003c/li\u003e\u003cli\u003eEach of them represents signed integers, such as '+2345'\u003c/li\u003e\u003cli\u003ePlease output the result of (X-Y) in a similar style.\u003c/li\u003e\u003c/ul\u003e","function_template":"function Z = mysub(X,Y)\r\n   Z = 0;\r\nend\r\n","test_suite":"%%\r\nX='+68768686834554';\r\nY='+76574535435398';\r\nZ_correct='-7805848600844';\r\nassert(isequal(mysub(X,Y),Z_correct))\r\n\r\n%%\r\nX='+1';\r\nY='+2';\r\nZ_correct ='-1';\r\nassert(isequal(mysub(X,Y),Z_correct))\r\n\r\n%%\r\nX='+100';\r\nY='+20';\r\nZ_correct ='+80';\r\nassert(isequal(mysub(X,Y),Z_correct))\r\n","published":true,"deleted":false,"likes_count":7,"comments_count":11,"created_by":166,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":1539,"test_suite_updated_at":"2017-10-16T20:04:25.000Z","rescore_all_solutions":false,"group_id":34,"created_at":"2012-04-08T02:27:39.000Z","updated_at":"2026-05-27T19:21:36.000Z","published_at":"2017-10-16T01:45:05.000Z","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:rPr\u003e\u003cw:b/\u003e\u003c/w:rPr\u003e\u003cw:t\u003e\u0026amp;plusmn \u0026amp;plusmn \u0026amp;plusmn \u0026amp;plusmn \u0026amp;plusmn \u0026amp;plusmn \u0026amp;plusmn \u0026amp;plusmn \u0026amp;plusmn \u0026amp;plusmn \u0026amp;plusmn\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eImagine you need to subtract one number from another using MATLAB.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eYou will not be using eval for this task.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eGiven two ASCII strings representing two integers X and Y.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eEach of them has only 12 or less ASCII characters.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eEach of them represents signed integers, such as '+2345'\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"ListParagraph\\\"/\u003e\u003cw:numPr\u003e\u003cw:numId w:val=\\\"1\\\"/\u003e\u003c/w:numPr\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003ePlease output the result of (X-Y) in a similar style.\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 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