Give a bad contest as an expert

• DFS/BFS
• Not advanced DP
• Other things are just observation and problem solving skills

Solving 2 fast or 3 slowly in a div 2 is more or less enough for div 2. Solving 4 — 5 in div 3 should suffice.

and I guess overall less bricking is what's necessary. When I was a pupil it was mostly due to bad performances canceling my good performances.

Just practice adhoc problems (Most codeforces problems written in the last 2-3 years are adhoc). You don't need to learn any advanced DSAs, just the basic techniques are enough.

Specialize in solving problems.

lol if u wanna get there ASAP just solve A/B div2 but as fast as you can i remember solving over 300 problems in one day few years ago and got to expert from newbie in 2-3 weeks

In div 2 contests according to me solving A super fast, B within 30 min and try solving C till the end.(For an average div 2 contest) In div 3 its mostly about the number of questions you can do.(You have to try to do all questions whose rating is 1500 or below).

Keep practising questions 1500 or below to improve speed and accuracy , and you should also be comfortable with using maps, sets , vectors etc etc as some questions are mostly implementation.

Good luck and keep practising.

these questions are repeated so many times!

please search for your question before you ask

first become pupil.

Check This Kartik's CF Specialist Sheet: 1400 and Beyond!

Well if you are capable of solving 2 problems on div2 fast you will become specialist slowly, but to come close to expert you have to be able to solve 3 div2 problems. You should know: binary search, greedy, math, logic and some dp + graphs; Have a great day!

Try to solve A,B problem faster if contest is of div2 . Also, to become pupil or specialist , div3 and div4 contests are more helpful.