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>

Solve

Solution Stats

254 Solutions
50 Solvers

Last Solution submitted on Nov 29, 2022

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...?

Problem Recent Solvers50

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Problem 43738. Negative without '-'

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers50

Suggested Problems

More from this Author11

Problem Tags

Community Treasure Hunt

Problem 43738. Negative without '-'

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers50

Suggested Problems

More from this Author11

Problem Tags

Community Treasure Hunt

Players