Worth mentioning that there's a companion book to this website: https://cses.fi/book/book.pdf https://cses.fi/book/book.pdf The problems are indeed of very hig

Worth mentioning that there's a companion book to this website: https://cses.fi/book/book.pdf https://cses.fi/book/book.pdf The problems are indeed of very high quality. But it can be a difficult place to start. For example, even the very first problem has an overflow gotcha built into it. Also, Kadane's Algorithm appears as an early problem even though several mathematicians and computer scientists failed to discover it: https://en.wikipedia.org/wiki/Maximum_subarray_problem#History https://en.wikipedia.org/wiki/Maximum_subarray_problem#Histo...