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Awesome Team
Vedran Čačić
https://web.math.hr/~veky
Last seen 12 hours ago
Member for 11 years, 6 months, 6 days
Difficulty Advanced
We shall not cease from exploration, and the end of all our exploring will be to arrive where we started and know the place for the first time.
Just a tip: matrix doesn't need to be singular if s[i][i]==0. Pivot can be somewhere below in that column, so by reordering equations, you can find it. (These tests are worthless, so you're ok here. Just thought you'd like to know generally.)
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First-marshall.zheng
You're reinventing the wheel. See Counter in collections module (standard library).
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If you're trying to see how it works: just print(r) between lines 5 and 6. I'm sure you'll see what r is, and then the rest is pretty obvious. (Of course, if there are any questions, just ask.)
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Nice usage of pop, but the variable s is used in a really weird way here. (With "nonlocal" it would be funnier.:) Those "+=" are in fact just "=", and "initialization" to 0 isn't needed. Also, pop could be used in both branches (or better, before "if"), so condition could be simplified.
Also, I h
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This is just to show various methods your system can be cheated. Fix these, and I'll find new ones. :-P
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Doesn't work on empty list.
checkio=f=lambda x:x.pop()+f(x)if x else 0
would be better. ;-)
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Meh. You could do much better if you were a bit bolder. :-D Maybe even find a closed formula. ;-P
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Yes, cool. While I was obsessed with canonical representation of lines, you rightly saw that all that was needed was \_\_eq\_\_ on them.
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LOL. This is the reason why I don't comment my code. :-] There would be more comments than code. :-)
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Last line is just
return s*(n == 1)
And yes, you could have get rid of that special case (given your hate for special cases) in line 2. For example,
return (s + (not s))*(n == 1)
Here you do need parentheses around not, since it is special in grammar. But "not" being special enab
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Again, no parentheses around "not s" are needed. You never need them when you use it as a logical condition, only as an arithmetical expression.
BTW sentinel really could have helped here (to reduce number of cases:). See mine. ;-)
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Nice usage of Zeckendorf's theorem. ;-)
BTW it would be more scary without that friendly looking boo-ghost. ;-D
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