Sir/mam,
Today i wanna ask a question that many coders on CF might be thinking of. i am still a div-2 contestant.i solved not more than 2 problems for my last 7 contests. on averge i solve 2 problems in any contest. BUT HOW TO SOLVE 3 AND 4? I saw many coders who solve 3 and 4 always in every contest.even i wanna solve like them. so,today i ask this question to coders who solve more than 2 on an verage in every contest, that what extra-thing you did,or what was the way that made yourself to solve 3 easily everytime, and how should we appraoch to solve like you? I HOPE MNY CODERS LIKE ME MIGHT BE INTERESTED TO SEE COMMENTS THAT HELPS A LOT. PLEASE REPLY. THANKS IN ADVANCE. please share some links,books etc,that you think that may be useful to crack 3. thanks in advance..........
Don't let your mental barriers affect you, but most importantly, if you want to improve, it is essential to commit time and effort. After a contest, go back and see the ones you struggled one, spend time trying to solve them yourself, and if you are really really stuck, read the editorial. Make sure you code it yourself, too.
To put it in a cryptic way: the only way you can learn to solve more problems, is to solve more problems. :) Good luck.
Just solved difficult problems(C, D, E, F) after contest. Again and again. Some time later, you'll gain enough expirience to solve really difficult problems.
Start with this Ladder Name: 6 — Codeforces Div. 2, C.
Description: List of random Codeforces problems, all of them are Div. 2 C problems. The problems are sorted, the most solved problem comes first. This is a good practice for whoever can solve almost all Div. 2 A and B problems, but might have some difficulties while solving the C problems.
My personal experience is that if you have problems with solving Div X Y problem, it's great to pick several Div X contests and solve problem Y from them.
E.g. you want to be able to solve Div2 C. You pick a Div2 C and solve it. If you tried too much but still couldn't solve it, read editorial. Move further until you feel that solving it is not a real big problem for you. After that you can do the same to Div2 D etc.