How to improve means from last month Iam practicing the 1500-1700 problems half of times Iam able to come up with solution, but I take at least 40-70 minutes for it and after solving it seems I can do it faster as if Iam observing some non-relevant things. or my combining power of observations to algo was slow. Second problem is that it is not easy to shift from algo or method that I come up with to another sometimes majorly for greedy ones and after I solve it and see other people solution they have used the same observation more efficiently for implementation. That looks so good as if they are doing it very easily. Third is sometimes I stuck on problem that I do-not able make observations but after seeing hints from editorial I make up the solution but that demotivates very much that I wasted my time plus not able to solve problem on my own.

Also, NEERAJ2003 from this id I give contest and from this I used to practice.