After creating a list of DP problems on Atcoder (though a small list, here’s the link A Surprise for Everyone), I thought why not have a list of problems on recursion on Atcoder (RECURSION the best friend of DP if not the fastest) because recursion is another topic that requires a lot of practice to develop that intuition and a sense of acceptance as to why it works. So here is the first problem that I am posting for this list and I request the community to post the links to some more problems on recursion from Atcoder ABC/ARC.

Here’s the list:-