Hii there folks…thanks for looking into this query…now…I want to ask that…Should I practice a lot of easy questions on codechef to be good at long challenge…um like 300 to 400 something…(to solve 5-6 ques in long ) I began CP a month ago and I implemented 120 something ques… beginner and easy mix…currently…but I can still only solve upto 2-3 ques in long div2…I still see some of the easy ques are also quite challenging…and what is the major diff. BTW a easy and medium ques…like on implementation level…
And lastly when is the good time to practice topics like trees,graphs,dp…cause I have heard a lot about them from other people…like how important they are… 
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