Problem 43738. Negative without '-'

Created by JD

Solve Later

<div style = "text-align: start; line-height: 20px; 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: normal; text-decoration: none; white-space: normal; "><div style="display: block; min-width: 0px; padding-top: 0px; transform-origin: 332px 25.5px; vertical-align: baseline; perspective-origin: 332px 25.5px; "><div style="font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-bottom: 9px; margin-left: 4px; margin-right: 10px; margin-top: 2px; text-align: left; transform-origin: 309px 10.5px; white-space: pre-wrap; perspective-origin: 309px 10.5px; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; margin-right: 10px; "><span style="display: inline; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; transform-origin: 0px 0px; perspective-origin: 0px 0px; "><span style="">Simple: return a negative number without using the '-' sign.</span></span></div><div style="font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-bottom: 9px; margin-left: 4px; margin-right: 10px; margin-top: 2px; text-align: left; transform-origin: 309px 10.5px; white-space: pre-wrap; perspective-origin: 309px 10.5px; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; margin-right: 10px; "><span style="display: inline; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; transform-origin: 0px 0px; perspective-origin: 0px 0px; "><span style="">Thanks to Problem</span></span><span style="display: inline; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; transform-origin: 0px 0px; perspective-origin: 0px 0px; "><span style=""> </span></span><a target='_blank' href = "https://www.mathworks.com/matlabcentral/cody/problems/813-multiply-2-numbers/solutions/new"><span style=""><span style="">813</span></span></a><span style="display: inline; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; transform-origin: 0px 0px; perspective-origin: 0px 0px; "><span style=""> for help with test suite.</span></span></div></div></div>

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Solution Stats

221 Solutions
38 Solvers

Last Solution submitted on Apr 05, 2021

Last 200 Solutions

Problem Comments

4 Comments

4 Comments

Show 1 older comment

James on 5 Feb 2019

JD, I think I figured out why Binbin and I (and more than likely a good number of other players) are having issues with your test suite. I think your "assert(isempty(strfind(filetext, '0')),'0 forbidden')" line is catching everyone who has the digit 0 in their MATLAB ID number. Binbin and I have that, while you do not. I just hacked the test suite, and tried a non-hacking correct answer from Alfonso...with the same result - my solution failed because 0 is forbidden.

Nikolaos Nikolaou on 7 Oct 2020

this is still true while the only diff is this is a badge problem now . Please fix

goc3 on 8 Oct 2020

The offending line—asserting lack of '0'—has been commented out.

Nikolaos Nikolaou on 16 Oct 2020

Thanks goc :)

Solution Comments

Solution 1109801

2 Comments

2 Comments

James on 24 Jan 2017

I'm also curious about the test suite, Binbin. I'm not quite sure why
y = diff([x+1 1]); fails the test suite.

JD on 7 Jul 2017

Binbin, James - I am not sure why either of your solutions didn't work. I submitted them, and they both passed... Maybe try resubmitting...? Maybe there's a bug in Cody...?

Solution 1077095

3 Comments

3 Comments

Binbin Qi on 12 Jan 2017

why this solution is wrong?

James on 24 Jan 2017

Sorry for the double comment, but I can't delete the one I posted under my solution.

I'm also curious about the test suite, Binbin. I'm not quite sure why my solution of "y = diff([x+1 1]);" fails the first test suite. I don't see any of the forbidden words in there.

JD on 7 Jul 2017

Binbin, James - I am not sure why either of your solutions didn't work. I submitted them, and they both passed... Maybe try resubmitting...? Maybe there's a bug in Cody...?

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Problem 43738. Negative without '-'

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Problem 43738. Negative without '-'

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Last 200 Solutions

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Problem Recent Solvers38

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