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Add permutations/combinations cheat sheets.

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Oleksii Trekhleb
2018-06-29 14:44:11 +03:00
parent 00f75028bf
commit b41cffea0f
2 changed files with 32 additions and 2 deletions
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17
src/algorithms/sets/combinations/README.md
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@ -50,6 +50,21 @@ Where `n` is the number of things to choose from, and we
choose `r` of them. Repetition allowed,
order doesn't matter.
## Cheat Sheets
Permutations cheat sheet
![Permutations Cheat Sheet](https://cdn-images-1.medium.com/max/2000/1*JNK-n0Pt0Vbxk0lxVpgT5A.png)
Combinations cheat sheet
![Combinations Cheat Sheet](https://cdn-images-1.medium.com/max/2000/1*7cFRn8jW4g_91YgDAbmxRQ.png)
Permutations/combinations algorithm ideas.
![Algorithms Idea](https://cdn-images-1.medium.com/max/2000/1*vLsSsZMnesCFPCYTYMbxrQ.png)
## References
[Math Is Fun](https://www.mathsisfun.com/combinatorics/combinations-permutations.html)
- [Math Is Fun](https://www.mathsisfun.com/combinatorics/combinations-permutations.html)
- [Permutations/combinations cheat sheets](https://medium.com/@trekhleb/permutations-combinations-algorithms-cheat-sheet-68c14879aba5)

17
src/algorithms/sets/permutations/README.md
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@ -37,6 +37,21 @@ For example the the lock below: it could be `333`.
n * n * n ... (r times) = n^r
```
## Cheat Sheets
Permutations cheat sheet
![Permutations Cheat Sheet](https://cdn-images-1.medium.com/max/2000/1*JNK-n0Pt0Vbxk0lxVpgT5A.png)
Combinations cheat sheet
![Combinations Cheat Sheet](https://cdn-images-1.medium.com/max/2000/1*7cFRn8jW4g_91YgDAbmxRQ.png)
Permutations/combinations algorithm ideas.
![Algorithms Idea](https://cdn-images-1.medium.com/max/2000/1*vLsSsZMnesCFPCYTYMbxrQ.png)
## References
[Math Is Fun](https://www.mathsisfun.com/combinatorics/combinations-permutations.html)
- [Math Is Fun](https://www.mathsisfun.com/combinatorics/combinations-permutations.html)
- [Permutations/combinations cheat sheets](https://medium.com/@trekhleb/permutations-combinations-algorithms-cheat-sheet-68c14879aba5)