copycat69's blog

DO YOU USE ITERATIVE DP??
By copycat69, history, 6 weeks ago, In English

I'm learning DP . Most of the code I've seen so far uses iterative DP. Is there anyone who uses Recursive DP?????

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6 weeks ago, # |
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Recursive dp usually has a lot of overhead time and memory-wise since recursion requires a call stack in memory and sometimes that exceeds the time or memory limit.

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6 weeks ago, # |
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I use recursive DP when I am unsure in order of computing(or a lot of parameters). If it TLs then I rewrite it on iterative(if it is possible).

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6 weeks ago, # |
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recursive dp sucks

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6 weeks ago, # |
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I've seen many blog and comments saying iterative DP is better in many ways.... How do you get better at iterative DP ? I mean you need to be good at Recursive DP first R8?

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    6 weeks ago, # ^ |
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    Though I am not very good with dp, i find iterative dp easier than recursive dp (maybe coz i am not that good with backtracking)

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6 weeks ago, # |
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recursive is more intuitive for me. Sometimes I'm forced to write iterative anyways though.

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6 weeks ago, # |
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I use iterative DP & now it's a lot easier to think in iterative way.

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6 weeks ago, # |
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As someone who codes Python too often, I'm immensely scared of whatever being recursive.

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6 weeks ago, # |
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It's OK to use recursive DP when learning DP. recursive DPs can be easier to understand when first learning DP because the relationships between states are more obvious to see. I mostly used recursive DP until I became purple.

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    6 weeks ago, # ^ |
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    how did you transition? I mean it's quite difficult to transform recursive dp thinking to an iterative one. Are there any tricks you use to develop this skill or do you first solve recursively then transform the solution to an iterative one?

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      6 weeks ago, # ^ |
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      Idk I did suffer when I first tried to use iterative DP instead of recursive ones.

      At some point iterative DP felt more comfortable than recursive DP.

      it's just magic. you try to use iterative DP and someday when you look back you are only using iterative DP.

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