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# Weekly Challenges

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## Challenge #391: Which Combinations of Pokémon Types Do Not Exist?

7 - Meteor

Pretty difficult challenge, but learned a lot from it.

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8 - Asteroid

Gotta Catch 'Em All!  Well, except for these ones

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8 - Asteroid
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Gotta Catch 'Em All!

10 - Fireball

This was a tough one for me.  I tried this solution and that, and still could not quite  get to the right answer.  I ended up leveraging the solution by @OllieClarke .

Thank you, Ollie - I tried to use the Tile tool, but it did not quite work for me - thanks for showing the way!

8 - Asteroid

Spoiler

Explanation:

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The steps my workflow takes are
1. Get all unique types
2. Get all unique pairs
3. Get all used pairs
4. Get all unused pairs

To distinguish pairs (Bug-Dark vs Dark-Bug), each pair is given a key where the types are ordered alphabetically

``IFF([Type1] <= [Type2], [Type1] + [Type2], [Type2] + [Type1])​``

8 - Asteroid

Solution with 6 blocks:

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13 - Pulsar
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7 - Meteor
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It was fun. Thanks for great challenge.
Here is my solution.

5 - Atom

In Type 1 we have 18 Unique Record

in Type 2 We have 18 Unique Record

So Total Combination has to 324

Now , some combination already given in Input dataset , there are total 188 Unique combination , which  is not mention in Input data

Note : It Actually a Nice Weekly Challenge

7 - Meteor
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