Hello people. I have encountered many expected number problems throughout this journey but i ignored them as they were too tough for me. but now i started learning about them. yesterday's atcoder contest problem F was a problem of this kind. but this was a little different compared to how the sushi problem of atcoder edu dp contest was solved. so there are a lot of variations and i am struggling a lot to solve them. so i wanted to ask you from where did you practice these expected numbers problems. Are there any places where i can get these problems to practice? Thanks in advance.