Duplicate suggestion below

what's some of the techniques you used?

Good solution, after some time we can not distinguish between Java and Javascripts :)

This is the best clever solution period

Thanks I am also trying URL and getting the error. It should be mentioned that you can't use URL.

In the problem, I would add a point on removing trailing spaces.

Thanks @XRFXLP. When I get some time, I will solve it without collection.

I've just noticed, that there is a mentioning in the "Task" section,

damn... Tho, I looked several time... :/

@dolamroth: could you check on gitter, plz?

I've just noticed, that there is a mentioning in the "Task" section, so I've removed the line I just added.

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python: it's not said in the description that numpy is forbidden...

Hint: use matrices !!!!!!!

Niether of those method should work, I'm not closing this issue because I can see that your solution passes the test(which it shouldn't)