Combinatorics understanding and practice difficulty

I had gone through the Combinatorics content given here. But I am facing lots of difficulties in getting a good understanding on them. Can you suggest some more resources which i could learn from or look into. I need a place to solve problem on this particular topic. Can you suggest me some sites or provide some links to solve problems on Combinatorics[Especially Permutations and Combinations ]? Thank you.

hello @Dancool32
u can refer hackerearth number theory articles.
link

@Dancool32
this one is also good->
https://cp-algorithms.com/

Thanks a lot! Are there any resources to solve problems based on the topic[Especially Combinatorics] from beginner level? @aman212yadav

refer this ,they have easy beginner level questions(articles along with questions ) as well .

Sure. Any link for combinatorics?

image

these three sections are there

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