Ask HN: What are your favorite code problems to give while interviewing?

Re:Ask HN: What are your favorite code problems to give whil... by siscia on Saturday June 13, 2015 @06:31AM (#9710561)

How do you flip two variable without a third one ?

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Re:Ask HN: What are your favorite code problems to give whil... by pdiddy on Saturday June 13, 2015 @08:36AM (#9710816)

Another way is to just use subtraction:

  x = x + y
  y = x - y
  x = x - y

I originally learned about this while preparing for some interviews.

The funny thing, I find, is that in Python you can simply do this:

  x, y = 5, 10
  x, y = y, x

I was asked this question in an interview and I responded that you can do this. His response: "Python is weird."

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Re:Ask HN: What are your favorite code problems to give whil... by sllabres on Saturday June 13, 2015 @07:29AM (#9710703)

search XOR (X=X XOR Y; Y=X XOR Y; X=X XOR Y)

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