I just recently became an expert and i know becoming candidate master takes much more practice than what it takes to become an expert and it varies person to person. So i'm just curious how many problems did you guys solve roughly to reach your level?

i came across a string problem where i thought of an approach where the number of operations i am doing is equal to sum of all factors of n. Now i don't know if this will pass the time limit. Can anybody help? what will be the time complexity of such operation

I'm currently targeting Div2D Problems and since Div2d sometimes needs some Data structures/algos, i just want to ask do you guys Implement big codes everytime or you just copy some templates and modify them according to the question in a contest?

Anybody noticed how much Codeforces system testing speed has improved in these days. Also, This is my first blog I'm just learning how to use it, plz don't downvote.