L_Drago_Destructor's blog

Help needed in parenthesis problem
By L_Drago_Destructor, history, 21 month(s) ago, In English

I was solving national OI when I stumbled across this (simple?) problem which I was unable to solve.

"Given N and K find the k-th lexicographically correct parenthesis of length N".

Example:

N = 4 k = 2

()()

Thanks in advance! Hope this question will help somebody else too.

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21 month(s) ago, # |
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what are the constrains for n and k?

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21 month(s) ago, # |
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You can find the solution here.

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    21 month(s) ago, # ^ |
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    Thanks! What difficulty do you think this (problem) is? Because I don't want to try to solve something that is way above my level.

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