Recently, I have been doing contest and stuck at Specialists for ~2 months. I recognize that my weakness is submitting WA and solving problems not fast enough (I could get into rank~1000 without it).

I know that in order to achieve Expert, you have to get into rank ~1000 at least 1-2 contests consecutively. Although I'm able to solve 60% of the contest problems, it requires fast coding and bug-free writing skill.

So, is there any site beside CF that you think that it's good and I could practice so as to achieve my goal?. I know that there are lots of Specialists guys have the same question as mine.

Thank you so much. Have a nice day ^^