Problem 43738. Negative without '-'

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Simple: return a negative number without using the '-' sign.
Thanks to Problem 813 for help with test suite.

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337 Solutions

71 Solvers

Last Solution submitted on Apr 03, 2026

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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 :)

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