What should I do to solve easy section problems and long challenge problems

hi I newly got promoted to 2nd division in codechef I looked at 2nd division long challenge problems iam unable to solve more than 3 problems and I am trying to solve easy section problems
at first i was able to solve easily but after some weeks I am unable to solve any problems without the help from editorial its frustrating can anyone give me some topics and tips to learn such that i can survive in 2nd division and to solve tougher problems in easy practice section


yup i am also in same phase just got promoted to div2.
i know how its feels

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