{"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":195,"title":"Program an exclusive OR operation with logical operators","description":"Program an exclusive or operation *without* using the MATLAB function xor.\r\n\r\nUse logical operators like |, \u0026, ~, ... instead.\r\n\r\nExamples:\r\n  \r\n  myXOR(1,1)\r\n    \r\n  ans = 0\r\n         \r\n    \r\n  myXOR(1,0)\r\n    \r\n  ans = 1\r\n    \r\n    \r\n  myXOR(0,1)\r\n    \r\n  ans = 1\r\n    \r\n         \r\n  myXOR(0,0)\r\n    \r\n  ans = 0","description_html":"\u003cp\u003eProgram an exclusive or operation \u003cb\u003ewithout\u003c/b\u003e using the MATLAB function xor.\u003c/p\u003e\u003cp\u003eUse logical operators like |, \u0026, ~, ... instead.\u003c/p\u003e\u003cp\u003eExamples:\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003emyXOR(1,1)\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003eans = 0\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003emyXOR(1,0)\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003eans = 1\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003emyXOR(0,1)\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003eans = 1\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003emyXOR(0,0)\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003eans = 0\r\n\u003c/pre\u003e","function_template":"function y = myXOR(a,b)\r\n  y=0;\r\nend","test_suite":"%%\r\na=0;b=0;\r\nres=0;\r\nassert(isequal(myXOR(a,b),res))\r\n\r\n%%\r\na=1;b=1;\r\nres=0;\r\nassert(isequal(myXOR(a,b),res))\r\n\r\n%%\r\na=1;b=0;\r\nres=1;\r\nassert(isequal(myXOR(a,b),res))\r\n\r\n%%\r\na=0;b=1;\r\nres=1;\r\nassert(isequal(myXOR(a,b),res))\r\n\r\n%%\r\na=[0 0 1 1];b=[1 0 1 0];\r\nres=[1 0 0 1];\r\nassert(isequal(myXOR(a,b),res))","published":true,"deleted":false,"likes_count":9,"comments_count":0,"created_by":564,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":751,"test_suite_updated_at":"2012-01-31T07:59:29.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2012-01-31T07:59:29.000Z","updated_at":"2026-04-02T12:43:53.000Z","published_at":"2012-01-31T08:03:50.000Z","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\u003eProgram an exclusive or operation\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\u003ewithout\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e using the MATLAB function xor.\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\u003eUse logical operators like\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:t\u003e, \u0026amp;, ~, ... instead.\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\u003eExamples:\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[myXOR(1,1)\\n\\nans = 0\\n\\nmyXOR(1,0)\\n\\nans = 1\\n\\nmyXOR(0,1)\\n\\nans = 1\\n\\nmyXOR(0,0)\\n\\nans = 0]]\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":45267,"title":"Zero","description":"given an integer a, find the smallest possible integer b(b\u003e0) such that their bitwise logical AND is zero.\r\n\r\n*  if a=11(1011) then b=4(0100)","description_html":"\u003cp\u003egiven an integer a, find the smallest possible integer b(b\u0026gt;0) such that their bitwise logical AND is zero.\u003c/p\u003e\u003cul\u003e\u003cli\u003eif a=11(1011) then b=4(0100)\u003c/li\u003e\u003c/ul\u003e","function_template":"function b=zero_and(a)\r\nend","test_suite":"%%\r\na = 1;\r\ny_correct = 2;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\na = 2;\r\ny_correct = 1;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\na = 12;\r\ny_correct = 1;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\na = 11;\r\ny_correct = 4;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\na = 15;\r\ny_correct = 16;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\na = 23;\r\ny_correct = 8;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\na = 93;\r\ny_correct = 2;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\na = 1455;\r\ny_correct = 16;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\na = 255;\r\ny_correct = 256;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\na = 435175;\r\ny_correct = 8;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\nfiletext = fileread('zero_and.m');\r\nassert(isempty(strfind(filetext, 'regexp')),'regexp() forbidden')\r\nassert(isempty(strfind(filetext, 'varargin')),'varargin() forbidden')\r\n","published":true,"deleted":false,"likes_count":1,"comments_count":0,"created_by":363598,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":26,"test_suite_updated_at":"2020-02-13T21:41:25.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2020-01-16T14:29:26.000Z","updated_at":"2026-05-30T04:51:57.000Z","published_at":"2020-01-16T14:30:08.000Z","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 an integer a, find the smallest possible integer b(b\u0026gt;0) such that their bitwise logical AND is zero.\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\u003eif a=11(1011) then b=4(0100)\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":195,"title":"Program an exclusive OR operation with logical operators","description":"Program an exclusive or operation *without* using the MATLAB function xor.\r\n\r\nUse logical operators like |, \u0026, ~, ... instead.\r\n\r\nExamples:\r\n  \r\n  myXOR(1,1)\r\n    \r\n  ans = 0\r\n         \r\n    \r\n  myXOR(1,0)\r\n    \r\n  ans = 1\r\n    \r\n    \r\n  myXOR(0,1)\r\n    \r\n  ans = 1\r\n    \r\n         \r\n  myXOR(0,0)\r\n    \r\n  ans = 0","description_html":"\u003cp\u003eProgram an exclusive or operation \u003cb\u003ewithout\u003c/b\u003e using the MATLAB function xor.\u003c/p\u003e\u003cp\u003eUse logical operators like |, \u0026, ~, ... instead.\u003c/p\u003e\u003cp\u003eExamples:\u003c/p\u003e\u003cpre class=\"language-matlab\"\u003emyXOR(1,1)\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003eans = 0\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003emyXOR(1,0)\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003eans = 1\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003emyXOR(0,1)\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003eans = 1\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003emyXOR(0,0)\r\n\u003c/pre\u003e\u003cpre class=\"language-matlab\"\u003eans = 0\r\n\u003c/pre\u003e","function_template":"function y = myXOR(a,b)\r\n  y=0;\r\nend","test_suite":"%%\r\na=0;b=0;\r\nres=0;\r\nassert(isequal(myXOR(a,b),res))\r\n\r\n%%\r\na=1;b=1;\r\nres=0;\r\nassert(isequal(myXOR(a,b),res))\r\n\r\n%%\r\na=1;b=0;\r\nres=1;\r\nassert(isequal(myXOR(a,b),res))\r\n\r\n%%\r\na=0;b=1;\r\nres=1;\r\nassert(isequal(myXOR(a,b),res))\r\n\r\n%%\r\na=[0 0 1 1];b=[1 0 1 0];\r\nres=[1 0 0 1];\r\nassert(isequal(myXOR(a,b),res))","published":true,"deleted":false,"likes_count":9,"comments_count":0,"created_by":564,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":751,"test_suite_updated_at":"2012-01-31T07:59:29.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2012-01-31T07:59:29.000Z","updated_at":"2026-04-02T12:43:53.000Z","published_at":"2012-01-31T08:03:50.000Z","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\u003eProgram an exclusive or operation\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\u003ewithout\u003c/w:t\u003e\u003c/w:r\u003e\u003cw:r\u003e\u003cw:t\u003e using the MATLAB function xor.\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\u003eUse logical operators like\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:t\u003e, \u0026amp;, ~, ... instead.\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\u003eExamples:\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[myXOR(1,1)\\n\\nans = 0\\n\\nmyXOR(1,0)\\n\\nans = 1\\n\\nmyXOR(0,1)\\n\\nans = 1\\n\\nmyXOR(0,0)\\n\\nans = 0]]\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":45267,"title":"Zero","description":"given an integer a, find the smallest possible integer b(b\u003e0) such that their bitwise logical AND is zero.\r\n\r\n*  if a=11(1011) then b=4(0100)","description_html":"\u003cp\u003egiven an integer a, find the smallest possible integer b(b\u0026gt;0) such that their bitwise logical AND is zero.\u003c/p\u003e\u003cul\u003e\u003cli\u003eif a=11(1011) then b=4(0100)\u003c/li\u003e\u003c/ul\u003e","function_template":"function b=zero_and(a)\r\nend","test_suite":"%%\r\na = 1;\r\ny_correct = 2;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\na = 2;\r\ny_correct = 1;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\na = 12;\r\ny_correct = 1;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\na = 11;\r\ny_correct = 4;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\na = 15;\r\ny_correct = 16;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\na = 23;\r\ny_correct = 8;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\na = 93;\r\ny_correct = 2;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\na = 1455;\r\ny_correct = 16;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\na = 255;\r\ny_correct = 256;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\na = 435175;\r\ny_correct = 8;\r\nassert(isequal(zero_and(a),y_correct))\r\n%%\r\nfiletext = fileread('zero_and.m');\r\nassert(isempty(strfind(filetext, 'regexp')),'regexp() forbidden')\r\nassert(isempty(strfind(filetext, 'varargin')),'varargin() 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