Problem 43738. Negative without '-'

Created by JD

Solve Later

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

Solve

Solution Stats

330 Solutions
68 Solvers

Last Solution submitted on Dec 27, 2025

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

Show comments

Problem Recent Solvers68

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 Solvers68

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 Solvers68

Suggested Problems

More from this Author11

Problem Tags

Community Treasure Hunt

Players