topovik's blog

Divide and Conquer optimization
By topovik, history, 5 years ago, In English

Hi for everyone.

At this blog I want to offer you some tasks on D&C optimization.

About this algorithm you can learn here.

When you can use this and other DP optimizations you can learn at this blog.

Some tasks on D&C optimization.

834D - The Bakery

673E - Levels and Regions

321E - Ciel and Gondolas

868F - Yet Another Minimization Problem

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5 years ago, # |
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I think that it is quite hard to solve 321E with D&C Optimization because the runtime is multiplied by 2. I tried several times and barely passed the time limit. I think there are very fast solutions to this problem but I am not sure if they used D&C optimization.

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    5 years ago, # ^ |
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    Author solve uses D&C optmization, so you can read this here

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      5 years ago, # ^ |
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      Well, the runtime is now multiplied by 2 due to change in servers. So I am not sure if the author's solution can pass so easily this time.

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        5 years ago, # ^ |
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        How do you solve it without this optimization? I had to do some dumb input reading tricks to get AC.

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5 years ago, # |
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Did you solve these tasks? These will be useful after you solve tasks and can tell about idea of these tasks

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5 years ago, # |
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https://codeforces.me/contest/1175/problem/G this task can't be solved using D&C optimization (Um_nik wrote it during the contest and get WA). Yes, here can be used D&C but it is another approach.

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5 years ago, # |
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Auto comment: topic has been updated by topovik (previous revision, new revision, compare).

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