{"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":44232,"title":"Relation between functions \"dec2bin\" \u0026 \"dec2binvec\"","description":"Here it's an easy problem we try to find the relation between the two functions \"dec2bin\" \u0026 \"dec2binvec\", so here you must write a function using \"dec2bin\" to find the result of \"dec2binvec\".\r\n\r\nNb:\r\n\r\nDEC2BINVEC Convert decimal number to a binary vector.\r\n\r\n    DEC2BINVEC(D) returns the binary representation of D as a binary\r\n    vector.  The least significant bit is represented by the first \r\n    column.  D must be a non-negative integer. \r\n \r\n    DEC2BINVEC(D,N) produces a binary representation with at least\r\n    N bits.\r\n \r\n    Example:\r\n       dec2binvec(23) returns [1 1 1 0 1]\r\n","description_html":"\u003cp\u003eHere it's an easy problem we try to find the relation between the two functions \"dec2bin\" \u0026 \"dec2binvec\", so here you must write a function using \"dec2bin\" to find the result of \"dec2binvec\".\u003c/p\u003e\u003cp\u003eNb:\u003c/p\u003e\u003cp\u003eDEC2BINVEC Convert decimal number to a binary vector.\u003c/p\u003e\u003cpre\u003e    DEC2BINVEC(D) returns the binary representation of D as a binary\r\n    vector.  The least significant bit is represented by the first \r\n    column.  D must be a non-negative integer. \u003c/pre\u003e\u003cpre\u003e    DEC2BINVEC(D,N) produces a binary representation with at least\r\n    N bits.\u003c/pre\u003e\u003cpre\u003e    Example:\r\n       dec2binvec(23) returns [1 1 1 0 1]\u003c/pre\u003e","function_template":"function y = dec_2_binvec(x)\r\ny=dec2binvec(x)\r\nend","test_suite":"%% \r\nfiletext = fileread('dec_2_binvec.m'); \r\nassert(isempty(strfind(filetext, 'regexp')),'regexp() and its family are forbidden') \r\nassert(isempty(strfind(filetext, 'dec2binvec')),'dec2binvec() forbidden')\r\nassert(isempty(strfind(filetext, 'num2str')),'num2str() forbidden') \r\nassert(isempty(strfind(filetext, 'regexprep')),'regexprep() forbidden')\r\nassert(isempty(strfind(filetext, 'for')),'for() forbidden') \r\nassert(isempty(strfind(filetext, 'while')),'while() forbidden')\r\nassert(isempty(strfind(filetext, 'if')),'if() forbidden') \r\nassert(isempty(strfind(filetext, 'mrdivide')),'mrdivide() forbidden') \r\nassert(isempty(strfind(filetext, 'mldivide')),'mldivide() forbidden') \r\nassert(isempty(strfind(filetext, '\\')),'\\ forbidden')\r\nassert(isempty(strfind(filetext, '/')),'/ forbidden') \r\nassert(isempty(strfind(filetext, '^')),'^ forbidden') \r\nassert(isempty(strfind(filetext, 'rem')),'rem() forbidden') \r\nassert(isempty(strfind(filetext, 'mod')),'mod() forbidden') \r\nassert(isempty(strfind(filetext, 'java')),'java forbidden')\r\n%%\r\nx = 1;\r\nassert(isequal(dec_2_binvec(x),1))\r\n%%\r\nx = 5;\r\nassert(isequal(dec_2_binvec(x),[1 0 1]))\r\n%%\r\nx = 1000;\r\nassert(isequal(dec_2_binvec(x),[0 0 0 1 0 1 1 1 1 1]))\r\n%%\r\nx = 2700;\r\nassert(isequal(dec_2_binvec(x),[0 0 1 1 0 0 0 1 0 1 0 1]))\r\n%%\r\nx = 8210;\r\nassert(isequal(dec_2_binvec(x),[0 1 0 0 1 0 0 0 0 0 0 0 0 1]))\r\n%%\r\nx = 44580;\r\nassert(isequal(dec_2_binvec(x),[0 0 1 0 0 1 0 0 0 1 1 1 0 1 0 1]))\r\n","published":true,"deleted":false,"likes_count":1,"comments_count":0,"created_by":37163,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":39,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2017-06-05T04:34:12.000Z","updated_at":"2026-02-10T13:36:50.000Z","published_at":"2017-06-05T04:34:12.000Z","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\u003eHere it's an easy problem we try to find the relation between the two functions \\\"dec2bin\\\" \u0026amp; \\\"dec2binvec\\\", so here you must write a function using \\\"dec2bin\\\" to find the result of \\\"dec2binvec\\\".\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\u003eNb:\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\u003eDEC2BINVEC Convert decimal number to a binary vector.\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[    DEC2BINVEC(D) returns the binary representation of D as a binary\\n    vector.  The least significant bit is represented by the first \\n    column.  D must be a non-negative integer. \\n\\n    DEC2BINVEC(D,N) produces a binary representation with at least\\n    N bits.\\n\\n    Example:\\n       dec2binvec(23) returns [1 1 1 0 1]]]\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":2432,"title":"Equation Times (of the day)","description":"Many times throughout the day can represent mathematical equations. In this problem, we focus on times that include the four basic operations (+,-,*,/). For example, 6:17 can be written as 6=1+7. Write a function that determines if the given time (restricted to three digits in 12-hour time, 1:00 to 9:59) is an equation time, and if so, which basic operation it uses. There are also four types of equations that are categorized here, and a given time can fit more than one category:\r\n\r\n - equation written forward, \"=\" doesn't coincide with \":\" --\u003e add 1 to output (e.g., 2:35, 2+3=5)\r\n\r\n - equation written forward, \"=\" does coincide with \":\" -- \u003e add 100 to output (e.g., 2:53, 2=5-3)\r\n\r\n - equation written backward, \"=\" doesn't coincide with \":\" --\u003e add 10 to output (e.g., 3:26, 6=2*3)\r\n\r\n - equation written backward, \"=\" does coincide with \":\" --\u003e add 1000 to output (e.g., 4:28, 8/2=4)\r\n\r\nNote that some of these combinations are tied to each other due to the commutative nature of + and * and the inverse relation of +,- and **,/. The output should be a 4x2 matrix with 0s or 1s in the first column dependent on whether each operation (+,-,*,/) is applicable to a given time and the totals in the second column. Examples include: \r\n\r\n4:22 | out = [1 1100; 1 1; 1 1100; 1 1]; since 4=2+2, 2+2=4; 4-2=2; 4=2*2, 2*2=4; 4/2=2.\r\n\r\n5:15 | out = [0 0; 0 0; 1 1111; 1 1001]; since 5*1=5, 5=1*5, 5*1=5, 5=1*5; 5/1=5, 5/1=5.\r\n\r\nThis problem is related to \u003chttp://www.mathworks.com/matlabcentral/cody/problems/2431-power-times-of-the-day Problem 2431\u003e and \u003chttp://www.mathworks.com/matlabcentral/cody/problems/2433-consecutive-equation-times-of-the-day Problem 2433\u003e.","description_html":"\u003cp\u003eMany times throughout the day can represent mathematical equations. In this problem, we focus on times that include the four basic operations (+,-,*,/). For example, 6:17 can be written as 6=1+7. Write a function that determines if the given time (restricted to three digits in 12-hour time, 1:00 to 9:59) is an equation time, and if so, which basic operation it uses. There are also four types of equations that are categorized here, and a given time can fit more than one category:\u003c/p\u003e\u003cpre\u003e - equation written forward, \"=\" doesn't coincide with \":\" --\u0026gt; add 1 to output (e.g., 2:35, 2+3=5)\u003c/pre\u003e\u003cpre\u003e - equation written forward, \"=\" does coincide with \":\" -- \u0026gt; add 100 to output (e.g., 2:53, 2=5-3)\u003c/pre\u003e\u003cpre\u003e - equation written backward, \"=\" doesn't coincide with \":\" --\u0026gt; add 10 to output (e.g., 3:26, 6=2*3)\u003c/pre\u003e\u003cpre\u003e - equation written backward, \"=\" does coincide with \":\" --\u0026gt; add 1000 to output (e.g., 4:28, 8/2=4)\u003c/pre\u003e\u003cp\u003eNote that some of these combinations are tied to each other due to the commutative nature of + and * and the inverse relation of +,- and ,/. The output should be a 4x2 matrix with 0s or 1s in the first column dependent on whether each operation (+,-,*,/) is applicable to a given time and the totals in the second column. Examples include:\u003c/p\u003e\u003cp\u003e4:22 | out = [1 1100; 1 1; 1 1100; 1 1]; since 4=2+2, 2+2=4; 4-2=2; 4=2*2, 2*2=4; 4/2=2.\u003c/p\u003e\u003cp\u003e5:15 | out = [0 0; 0 0; 1 1111; 1 1001]; since 5*1=5, 5=1*5, 5*1=5, 5=1*5; 5/1=5, 5/1=5.\u003c/p\u003e\u003cp\u003eThis problem is related to \u003ca href = \"http://www.mathworks.com/matlabcentral/cody/problems/2431-power-times-of-the-day\"\u003eProblem 2431\u003c/a\u003e and \u003ca href = \"http://www.mathworks.com/matlabcentral/cody/problems/2433-consecutive-equation-times-of-the-day\"\u003eProblem 2433\u003c/a\u003e.\u003c/p\u003e","function_template":"function out = equation_time(time)\r\n out = 0;\r\nend","test_suite":"%%\r\ntime = '4:22';\r\ny_correct = [1 1100;\r\n\t1 1;\r\n\t1 1100;\r\n\t1 1];\r\nassert(isequal(equation_time(time),y_correct))\r\n\r\n%%\r\ntime = '2:38';\r\ny_correct = zeros(4,2);\r\nassert(isequal(equation_time(time),y_correct))\r\n\r\n%%\r\ntime = '5:15';\r\ny_correct = [0 0;\r\n\t0 0;\r\n\t1 1111;\r\n \t1 1001];\r\nassert(isequal(equation_time(time),y_correct))\r\n\r\n%%\r\ntime = '1:23';\r\ny_correct = [1 11;\r\n\t1 1000;\r\n\t0 0;\r\n \t0 0];\r\nassert(isequal(equation_time(time),y_correct))\r\n\r\n%%\r\ntime = '1:02';\r\ny_correct = zeros(4,2);\r\nassert(isequal(equation_time(time),y_correct))\r\n\r\n%%\r\ntime = '1:11';\r\ny_correct = [0 0;\r\n\t0 0;\r\n\t1 1111;\r\n \t1 1111];\r\nassert(isequal(equation_time(time),y_correct))\r\n\r\n%%\r\ntime = '2:11';\r\ny_correct = [1 1100;\r\n\t1 1;\r\n\t0 0;\r\n \t0 0];\r\nassert(isequal(equation_time(time),y_correct))","published":true,"deleted":false,"likes_count":3,"comments_count":0,"created_by":26769,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":79,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":45,"created_at":"2014-07-15T18:39:02.000Z","updated_at":"2026-01-15T14:29:10.000Z","published_at":"2014-07-15T18:39:02.000Z","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\u003eMany times throughout the day can represent mathematical equations. In this problem, we focus on times that include the four basic operations (+,-,*,/). For example, 6:17 can be written as 6=1+7. Write a function that determines if the given time (restricted to three digits in 12-hour time, 1:00 to 9:59) is an equation time, and if so, which basic operation it uses. There are also four types of equations that are categorized here, and a given time can fit more than one category:\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[ - equation written forward, \\\"=\\\" doesn't coincide with \\\":\\\" --\u003e add 1 to output (e.g., 2:35, 2+3=5)\\n\\n - equation written forward, \\\"=\\\" does coincide with \\\":\\\" -- \u003e add 100 to output (e.g., 2:53, 2=5-3)\\n\\n - equation written backward, \\\"=\\\" doesn't coincide with \\\":\\\" --\u003e add 10 to output (e.g., 3:26, 6=2*3)\\n\\n - equation written backward, \\\"=\\\" does coincide with \\\":\\\" --\u003e add 1000 to output (e.g., 4:28, 8/2=4)]]\u003e\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\u003eNote that some of these combinations are tied to each other due to the commutative nature of + and * and the inverse relation of +,- and ,/. The output should be a 4x2 matrix with 0s or 1s in the first column dependent on whether each operation (+,-,*,/) is applicable to a given time and the totals in the second column. Examples include:\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\u003e4:22 | out = [1 1100; 1 1; 1 1100; 1 1]; since 4=2+2, 2+2=4; 4-2=2; 4=2*2, 2*2=4; 4/2=2.\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\u003e5:15 | out = [0 0; 0 0; 1 1111; 1 1001]; since 5*1=5, 5=1*5, 5*1=5, 5=1*5; 5/1=5, 5/1=5.\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\u003eThis problem is related to\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=\\\"http://www.mathworks.com/matlabcentral/cody/problems/2431-power-times-of-the-day\\\"\u003e\u003cw:r\u003e\u003cw:t\u003eProblem 2431\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e and\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=\\\"http://www.mathworks.com/matlabcentral/cody/problems/2433-consecutive-equation-times-of-the-day\\\"\u003e\u003cw:r\u003e\u003cw:t\u003eProblem 2433\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\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":{"errors":[],"problems":[{"id":44232,"title":"Relation between functions \"dec2bin\" \u0026 \"dec2binvec\"","description":"Here it's an easy problem we try to find the relation between the two functions \"dec2bin\" \u0026 \"dec2binvec\", so here you must write a function using \"dec2bin\" to find the result of \"dec2binvec\".\r\n\r\nNb:\r\n\r\nDEC2BINVEC Convert decimal number to a binary vector.\r\n\r\n    DEC2BINVEC(D) returns the binary representation of D as a binary\r\n    vector.  The least significant bit is represented by the first \r\n    column.  D must be a non-negative integer. \r\n \r\n    DEC2BINVEC(D,N) produces a binary representation with at least\r\n    N bits.\r\n \r\n    Example:\r\n       dec2binvec(23) returns [1 1 1 0 1]\r\n","description_html":"\u003cp\u003eHere it's an easy problem we try to find the relation between the two functions \"dec2bin\" \u0026 \"dec2binvec\", so here you must write a function using \"dec2bin\" to find the result of \"dec2binvec\".\u003c/p\u003e\u003cp\u003eNb:\u003c/p\u003e\u003cp\u003eDEC2BINVEC Convert decimal number to a binary vector.\u003c/p\u003e\u003cpre\u003e    DEC2BINVEC(D) returns the binary representation of D as a binary\r\n    vector.  The least significant bit is represented by the first \r\n    column.  D must be a non-negative integer. \u003c/pre\u003e\u003cpre\u003e    DEC2BINVEC(D,N) produces a binary representation with at least\r\n    N bits.\u003c/pre\u003e\u003cpre\u003e    Example:\r\n       dec2binvec(23) returns [1 1 1 0 1]\u003c/pre\u003e","function_template":"function y = dec_2_binvec(x)\r\ny=dec2binvec(x)\r\nend","test_suite":"%% \r\nfiletext = fileread('dec_2_binvec.m'); \r\nassert(isempty(strfind(filetext, 'regexp')),'regexp() and its family are forbidden') \r\nassert(isempty(strfind(filetext, 'dec2binvec')),'dec2binvec() forbidden')\r\nassert(isempty(strfind(filetext, 'num2str')),'num2str() forbidden') \r\nassert(isempty(strfind(filetext, 'regexprep')),'regexprep() forbidden')\r\nassert(isempty(strfind(filetext, 'for')),'for() forbidden') \r\nassert(isempty(strfind(filetext, 'while')),'while() forbidden')\r\nassert(isempty(strfind(filetext, 'if')),'if() forbidden') \r\nassert(isempty(strfind(filetext, 'mrdivide')),'mrdivide() forbidden') \r\nassert(isempty(strfind(filetext, 'mldivide')),'mldivide() forbidden') \r\nassert(isempty(strfind(filetext, '\\')),'\\ forbidden')\r\nassert(isempty(strfind(filetext, '/')),'/ forbidden') \r\nassert(isempty(strfind(filetext, '^')),'^ forbidden') \r\nassert(isempty(strfind(filetext, 'rem')),'rem() forbidden') \r\nassert(isempty(strfind(filetext, 'mod')),'mod() forbidden') \r\nassert(isempty(strfind(filetext, 'java')),'java forbidden')\r\n%%\r\nx = 1;\r\nassert(isequal(dec_2_binvec(x),1))\r\n%%\r\nx = 5;\r\nassert(isequal(dec_2_binvec(x),[1 0 1]))\r\n%%\r\nx = 1000;\r\nassert(isequal(dec_2_binvec(x),[0 0 0 1 0 1 1 1 1 1]))\r\n%%\r\nx = 2700;\r\nassert(isequal(dec_2_binvec(x),[0 0 1 1 0 0 0 1 0 1 0 1]))\r\n%%\r\nx = 8210;\r\nassert(isequal(dec_2_binvec(x),[0 1 0 0 1 0 0 0 0 0 0 0 0 1]))\r\n%%\r\nx = 44580;\r\nassert(isequal(dec_2_binvec(x),[0 0 1 0 0 1 0 0 0 1 1 1 0 1 0 1]))\r\n","published":true,"deleted":false,"likes_count":1,"comments_count":0,"created_by":37163,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":39,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2017-06-05T04:34:12.000Z","updated_at":"2026-02-10T13:36:50.000Z","published_at":"2017-06-05T04:34:12.000Z","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\u003eHere it's an easy problem we try to find the relation between the two functions \\\"dec2bin\\\" \u0026amp; \\\"dec2binvec\\\", so here you must write a function using \\\"dec2bin\\\" to find the result of \\\"dec2binvec\\\".\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\u003eNb:\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\u003eDEC2BINVEC Convert decimal number to a binary vector.\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[    DEC2BINVEC(D) returns the binary representation of D as a binary\\n    vector.  The least significant bit is represented by the first \\n    column.  D must be a non-negative integer. \\n\\n    DEC2BINVEC(D,N) produces a binary representation with at least\\n    N bits.\\n\\n    Example:\\n       dec2binvec(23) returns [1 1 1 0 1]]]\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":2432,"title":"Equation Times (of the day)","description":"Many times throughout the day can represent mathematical equations. In this problem, we focus on times that include the four basic operations (+,-,*,/). For example, 6:17 can be written as 6=1+7. Write a function that determines if the given time (restricted to three digits in 12-hour time, 1:00 to 9:59) is an equation time, and if so, which basic operation it uses. There are also four types of equations that are categorized here, and a given time can fit more than one category:\r\n\r\n - equation written forward, \"=\" doesn't coincide with \":\" --\u003e add 1 to output (e.g., 2:35, 2+3=5)\r\n\r\n - equation written forward, \"=\" does coincide with \":\" -- \u003e add 100 to output (e.g., 2:53, 2=5-3)\r\n\r\n - equation written backward, \"=\" doesn't coincide with \":\" --\u003e add 10 to output (e.g., 3:26, 6=2*3)\r\n\r\n - equation written backward, \"=\" does coincide with \":\" --\u003e add 1000 to output (e.g., 4:28, 8/2=4)\r\n\r\nNote that some of these combinations are tied to each other due to the commutative nature of + and * and the inverse relation of +,- and **,/. The output should be a 4x2 matrix with 0s or 1s in the first column dependent on whether each operation (+,-,*,/) is applicable to a given time and the totals in the second column. Examples include: \r\n\r\n4:22 | out = [1 1100; 1 1; 1 1100; 1 1]; since 4=2+2, 2+2=4; 4-2=2; 4=2*2, 2*2=4; 4/2=2.\r\n\r\n5:15 | out = [0 0; 0 0; 1 1111; 1 1001]; since 5*1=5, 5=1*5, 5*1=5, 5=1*5; 5/1=5, 5/1=5.\r\n\r\nThis problem is related to \u003chttp://www.mathworks.com/matlabcentral/cody/problems/2431-power-times-of-the-day Problem 2431\u003e and \u003chttp://www.mathworks.com/matlabcentral/cody/problems/2433-consecutive-equation-times-of-the-day Problem 2433\u003e.","description_html":"\u003cp\u003eMany times throughout the day can represent mathematical equations. In this problem, we focus on times that include the four basic operations (+,-,*,/). For example, 6:17 can be written as 6=1+7. Write a function that determines if the given time (restricted to three digits in 12-hour time, 1:00 to 9:59) is an equation time, and if so, which basic operation it uses. There are also four types of equations that are categorized here, and a given time can fit more than one category:\u003c/p\u003e\u003cpre\u003e - equation written forward, \"=\" doesn't coincide with \":\" --\u0026gt; add 1 to output (e.g., 2:35, 2+3=5)\u003c/pre\u003e\u003cpre\u003e - equation written forward, \"=\" does coincide with \":\" -- \u0026gt; add 100 to output (e.g., 2:53, 2=5-3)\u003c/pre\u003e\u003cpre\u003e - equation written backward, \"=\" doesn't coincide with \":\" --\u0026gt; add 10 to output (e.g., 3:26, 6=2*3)\u003c/pre\u003e\u003cpre\u003e - equation written backward, \"=\" does coincide with \":\" --\u0026gt; add 1000 to output (e.g., 4:28, 8/2=4)\u003c/pre\u003e\u003cp\u003eNote that some of these combinations are tied to each other due to the commutative nature of + and * and the inverse relation of +,- and ,/. The output should be a 4x2 matrix with 0s or 1s in the first column dependent on whether each operation (+,-,*,/) is applicable to a given time and the totals in the second column. Examples include:\u003c/p\u003e\u003cp\u003e4:22 | out = [1 1100; 1 1; 1 1100; 1 1]; since 4=2+2, 2+2=4; 4-2=2; 4=2*2, 2*2=4; 4/2=2.\u003c/p\u003e\u003cp\u003e5:15 | out = [0 0; 0 0; 1 1111; 1 1001]; since 5*1=5, 5=1*5, 5*1=5, 5=1*5; 5/1=5, 5/1=5.\u003c/p\u003e\u003cp\u003eThis problem is related to \u003ca href = \"http://www.mathworks.com/matlabcentral/cody/problems/2431-power-times-of-the-day\"\u003eProblem 2431\u003c/a\u003e and \u003ca href = \"http://www.mathworks.com/matlabcentral/cody/problems/2433-consecutive-equation-times-of-the-day\"\u003eProblem 2433\u003c/a\u003e.\u003c/p\u003e","function_template":"function out = equation_time(time)\r\n out = 0;\r\nend","test_suite":"%%\r\ntime = '4:22';\r\ny_correct = [1 1100;\r\n\t1 1;\r\n\t1 1100;\r\n\t1 1];\r\nassert(isequal(equation_time(time),y_correct))\r\n\r\n%%\r\ntime = '2:38';\r\ny_correct = zeros(4,2);\r\nassert(isequal(equation_time(time),y_correct))\r\n\r\n%%\r\ntime = '5:15';\r\ny_correct = [0 0;\r\n\t0 0;\r\n\t1 1111;\r\n \t1 1001];\r\nassert(isequal(equation_time(time),y_correct))\r\n\r\n%%\r\ntime = '1:23';\r\ny_correct = [1 11;\r\n\t1 1000;\r\n\t0 0;\r\n \t0 0];\r\nassert(isequal(equation_time(time),y_correct))\r\n\r\n%%\r\ntime = '1:02';\r\ny_correct = zeros(4,2);\r\nassert(isequal(equation_time(time),y_correct))\r\n\r\n%%\r\ntime = '1:11';\r\ny_correct = [0 0;\r\n\t0 0;\r\n\t1 1111;\r\n \t1 1111];\r\nassert(isequal(equation_time(time),y_correct))\r\n\r\n%%\r\ntime = '2:11';\r\ny_correct = [1 1100;\r\n\t1 1;\r\n\t0 0;\r\n \t0 0];\r\nassert(isequal(equation_time(time),y_correct))","published":true,"deleted":false,"likes_count":3,"comments_count":0,"created_by":26769,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":79,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":45,"created_at":"2014-07-15T18:39:02.000Z","updated_at":"2026-01-15T14:29:10.000Z","published_at":"2014-07-15T18:39:02.000Z","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\u003eMany times throughout the day can represent mathematical equations. In this problem, we focus on times that include the four basic operations (+,-,*,/). For example, 6:17 can be written as 6=1+7. Write a function that determines if the given time (restricted to three digits in 12-hour time, 1:00 to 9:59) is an equation time, and if so, which basic operation it uses. There are also four types of equations that are categorized here, and a given time can fit more than one category:\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[ - equation written forward, \\\"=\\\" doesn't coincide with \\\":\\\" --\u003e add 1 to output (e.g., 2:35, 2+3=5)\\n\\n - equation written forward, \\\"=\\\" does coincide with \\\":\\\" -- \u003e add 100 to output (e.g., 2:53, 2=5-3)\\n\\n - equation written backward, \\\"=\\\" doesn't coincide with \\\":\\\" --\u003e add 10 to output (e.g., 3:26, 6=2*3)\\n\\n - equation written backward, \\\"=\\\" does coincide with \\\":\\\" --\u003e add 1000 to output (e.g., 4:28, 8/2=4)]]\u003e\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\u003eNote that some of these combinations are tied to each other due to the commutative nature of + and * and the inverse relation of +,- and ,/. The output should be a 4x2 matrix with 0s or 1s in the first column dependent on whether each operation (+,-,*,/) is applicable to a given time and the totals in the second column. Examples include:\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\u003e4:22 | out = [1 1100; 1 1; 1 1100; 1 1]; since 4=2+2, 2+2=4; 4-2=2; 4=2*2, 2*2=4; 4/2=2.\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\u003e5:15 | out = [0 0; 0 0; 1 1111; 1 1001]; since 5*1=5, 5=1*5, 5*1=5, 5=1*5; 5/1=5, 5/1=5.\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\u003eThis problem is related to\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=\\\"http://www.mathworks.com/matlabcentral/cody/problems/2431-power-times-of-the-day\\\"\u003e\u003cw:r\u003e\u003cw:t\u003eProblem 2431\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\u003e and\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=\\\"http://www.mathworks.com/matlabcentral/cody/problems/2433-consecutive-equation-times-of-the-day\\\"\u003e\u003cw:r\u003e\u003cw:t\u003eProblem 2433\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:hyperlink\u003e\u003cw:r\u003e\u003cw:t\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\"}]}"}],"term":"tag:\"minus\"","current_player_id":null,"fields":[{"name":"page","type":"integer","callback":null,"default":1,"directive":null,"facet":null,"facet_method":"and","operator":null,"param":null,"static":null,"prepend":true},{"name":"per_page","type":"integer","callback":null,"default":50,"directive":null,"facet":null,"facet_method":"and","operator":null,"param":null,"static":null,"prepend":true},{"name":"sort","type":"string","callback":null,"default":null,"directive":null,"facet":null,"facet_method":"and","operator":null,"param":null,"static":null,"prepend":true},{"name":"body","type":"text","callback":null,"default":"*:*","directive":null,"facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":false},{"name":"group","type":"string","callback":null,"default":null,"directive":"group","facet":true,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"difficulty_rating_bin","type":"string","callback":null,"default":null,"directive":"difficulty_rating_bin","facet":true,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"id","type":"integer","callback":null,"default":null,"directive":"id","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"tag","type":"string","callback":null,"default":null,"directive":"tag","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"product","type":"string","callback":null,"default":null,"directive":"product","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"created_at","type":"timeframe","callback":{},"default":null,"directive":"created_at","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"profile_id","type":"integer","callback":null,"default":null,"directive":"author_id","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"created_by","type":"string","callback":null,"default":null,"directive":"author","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"player_id","type":"integer","callback":null,"default":null,"directive":"solver_id","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"player","type":"string","callback":null,"default":null,"directive":"solver","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"solvers_count","type":"integer","callback":null,"default":null,"directive":"solvers_count","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"comments_count","type":"integer","callback":null,"default":null,"directive":"comments_count","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"likes_count","type":"integer","callback":null,"default":null,"directive":"likes_count","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"leader_id","type":"integer","callback":null,"default":null,"directive":"leader_id","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true},{"name":"leading_solution","type":"integer","callback":null,"default":null,"directive":"leading_solution","facet":null,"facet_method":"and","operator":null,"param":"term","static":null,"prepend":true}],"filters":[{"name":"asset_type","type":"string","callback":null,"default":null,"directive":null,"facet":null,"facet_method":"and","operator":null,"param":null,"static":"\"cody:problem\"","prepend":true},{"name":"profile_id","type":"integer","callback":{},"default":null,"directive":null,"facet":null,"facet_method":"and","operator":null,"param":"author_id","static":null,"prepend":true}],"query":{"params":{"per_page":50,"term":"tag:\"minus\"","current_player":null,"sort":"map(difficulty_value,0,0,999) asc"},"parser":"MathWorks::Search::Solr::QueryParser","directives":{"term":{"directives":{"tag":[["tag:\"minus\"","","\"","minus","\""]]}}},"facets":{"#\u003cMathWorks::Search::Field:0x00007f45e5eedc20\u003e":null,"#\u003cMathWorks::Search::Field:0x00007f45e5eedb80\u003e":null},"filters":{"#\u003cMathWorks::Search::Field:0x00007f45e5eed2c0\u003e":"\"cody:problem\""},"fields":{"#\u003cMathWorks::Search::Field:0x00007f45e5eedea0\u003e":1,"#\u003cMathWorks::Search::Field:0x00007f45e5eede00\u003e":50,"#\u003cMathWorks::Search::Field:0x00007f45e5eedd60\u003e":"map(difficulty_value,0,0,999) asc","#\u003cMathWorks::Search::Field:0x00007f45e5eedcc0\u003e":"tag:\"minus\""},"user_query":{"#\u003cMathWorks::Search::Field:0x00007f45e5eedcc0\u003e":"tag:\"minus\""},"queried_facets":{}},"query_backend":{"connection":{"configuration":{"index_url":"http://index-op-v2/solr/","query_url":"http://search-op-v2/solr/","direct_access_index_urls":["http://index-op-v2/solr/"],"direct_access_query_urls":["http://search-op-v2/solr/"],"timeout":10,"vhost":"search","exchange":"search.topic","heartbeat":30,"pre_index_mode":false,"host":"rabbitmq-eks","port":5672,"username":"search","password":"J3bGPZzQ7asjJcCk","virtual_host":"search","indexer":"amqp","http_logging":"true","core":"cody"},"query_connection":{"uri":"http://search-op-v2/solr/cody/","proxy":null,"connection":{"parallel_manager":null,"headers":{"User-Agent":"Faraday v1.0.1"},"params":{},"options":{"params_encoder":"Faraday::FlatParamsEncoder","proxy":null,"bind":null,"timeout":null,"open_timeout":null,"read_timeout":null,"write_timeout":null,"boundary":null,"oauth":null,"context":null,"on_data":null},"ssl":{"verify":true,"ca_file":null,"ca_path":null,"verify_mode":null,"cert_store":null,"client_cert":null,"client_key":null,"certificate":null,"private_key":null,"verify_depth":null,"version":null,"min_version":null,"max_version":null},"default_parallel_manager":null,"builder":{"adapter":{"name":"Faraday::Adapter::NetHttp","args":[],"block":null},"handlers":[{"name":"Faraday::Response::RaiseError","args":[],"block":null}],"app":{"app":{"ssl_cert_store":{"verify_callback":null,"error":null,"error_string":null,"chain":null,"time":null},"app":{},"connection_options":{},"config_block":null}}},"url_prefix":"http://search-op-v2/solr/cody/","manual_proxy":false,"proxy":null},"update_format":"RSolr::JSON::Generator","update_path":"update","options":{"url":"http://search-op-v2/solr/cody"}}},"query":{"params":{"per_page":50,"term":"tag:\"minus\"","current_player":null,"sort":"map(difficulty_value,0,0,999) asc"},"parser":"MathWorks::Search::Solr::QueryParser","directives":{"term":{"directives":{"tag":[["tag:\"minus\"","","\"","minus","\""]]}}},"facets":{"#\u003cMathWorks::Search::Field:0x00007f45e5eedc20\u003e":null,"#\u003cMathWorks::Search::Field:0x00007f45e5eedb80\u003e":null},"filters":{"#\u003cMathWorks::Search::Field:0x00007f45e5eed2c0\u003e":"\"cody:problem\""},"fields":{"#\u003cMathWorks::Search::Field:0x00007f45e5eedea0\u003e":1,"#\u003cMathWorks::Search::Field:0x00007f45e5eede00\u003e":50,"#\u003cMathWorks::Search::Field:0x00007f45e5eedd60\u003e":"map(difficulty_value,0,0,999) asc","#\u003cMathWorks::Search::Field:0x00007f45e5eedcc0\u003e":"tag:\"minus\""},"user_query":{"#\u003cMathWorks::Search::Field:0x00007f45e5eedcc0\u003e":"tag:\"minus\""},"queried_facets":{}},"options":{"fields":["id","difficulty_rating"]},"join":" "},"results":[{"id":44232,"difficulty_rating":"easy"},{"id":2432,"difficulty_rating":"easy-medium"}]}}