Good evening / morning / afternoon codeforces. I made this new codeforces id, because after solving lots of problem of 1500-1600 I was not able to reach specialist, not able to solve C level problem on Div 2 contests. After seeing the number of problems and my rating I feel sad, as my rating was not defining the number of problems I did on that level. My current rating in previous id nearly 1380. So I decided to start from the begginning. I decided to become expert in upcoming two months and practice a lot. I just solved many problems, sometimes copy pasted editorails code in my solution when got frustated, but this time I wont do.

So friends, by following the previous thing I wont be able to reach expert. So I need your help in how to reach expert, although my goal is not expert its much higher, but its my subtask which has some points.

Please guide me, how to reach at expert level. I have studied all standard algorithms but have forgotton, because now generally observation and constructive problems comes in contest, so guide me which topics to study and do how many problems of each topic should solve, or any thing which you think will help me and my other fellow friends who are stuck at the same level like me.

Thanking you, and have a nice day.