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Add permutations/combinations cheat sheets.

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Lines changed: 16 additions & 1 deletion

Original file line number	Diff line number	Diff line change
@@ -50,6 +50,21 @@ Where `n` is the number of things to choose from, and we
`50`	`50`	choose`r` of them. Repetition allowed,
`51`	`51`	`order doesn't matter.`
`52`	`52`
	`53`	`+##Cheat Sheets`
	`54`	`+`
	`55`	`+Permutations cheat sheet`
	`56`	`+`
	`57`	`+![Permutations Cheat Sheet](https://cdn-images-1.medium.com/max/2000/1*JNK-n0Pt0Vbxk0lxVpgT5A.png)`
	`58`	`+`
	`59`	`+Combinations cheat sheet`
	`60`	`+`
	`61`	`+![Combinations Cheat Sheet](https://cdn-images-1.medium.com/max/2000/1*7cFRn8jW4g_91YgDAbmxRQ.png)`
	`62`	`+`
	`63`	`+Permutations/combinations algorithm ideas.`
	`64`	`+`
	`65`	`+![Algorithms Idea](https://cdn-images-1.medium.com/max/2000/1*vLsSsZMnesCFPCYTYMbxrQ.png)`
	`66`	`+`
`53`	`67`	`##References`
`54`	`68`
`55`		`-[Math Is Fun](https://www.mathsisfun.com/combinatorics/combinations-permutations.html)`
	`69`	`+-[Math Is Fun](https://www.mathsisfun.com/combinatorics/combinations-permutations.html)`
	`70`	`+-[Permutations/combinations cheat sheets](https://medium.com/@trekhleb/permutations-combinations-algorithms-cheat-sheet-68c14879aba5)`

Lines changed: 16 additions & 1 deletion

Original file line number	Diff line number	Diff line change
@@ -37,6 +37,21 @@ For example the the lock below: it could be `333`.
`37`	`37`	`n * n * n ... (r times) = n^r`
`38`	`38`	```
`39`	`39`
	`40`	`+##Cheat Sheets`
	`41`	`+`
	`42`	`+Permutations cheat sheet`
	`43`	`+`
	`44`	`+![Permutations Cheat Sheet](https://cdn-images-1.medium.com/max/2000/1*JNK-n0Pt0Vbxk0lxVpgT5A.png)`
	`45`	`+`
	`46`	`+Combinations cheat sheet`
	`47`	`+`
	`48`	`+![Combinations Cheat Sheet](https://cdn-images-1.medium.com/max/2000/1*7cFRn8jW4g_91YgDAbmxRQ.png)`
	`49`	`+`
	`50`	`+Permutations/combinations algorithm ideas.`
	`51`	`+`
	`52`	`+![Algorithms Idea](https://cdn-images-1.medium.com/max/2000/1*vLsSsZMnesCFPCYTYMbxrQ.png)`
	`53`	`+`
`40`	`54`	`##References`
`41`	`55`
`42`		`-[Math Is Fun](https://www.mathsisfun.com/combinatorics/combinations-permutations.html)`
	`56`	`+-[Math Is Fun](https://www.mathsisfun.com/combinatorics/combinations-permutations.html)`
	`57`	`+-[Permutations/combinations cheat sheets](https://medium.com/@trekhleb/permutations-combinations-algorithms-cheat-sheet-68c14879aba5)`

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