Hi, I am a beginner in code forces and till now I have solved multiple problems for A and B and even some of C and D and E too. Still, I was not able to perform even in a single question correctly in DIV 2 A (Round 664 Div2). Failed pretest 2 times with the wrong answer and 1 time with TLE.

I want helpful tips from the community. Please do comment if u some helpful guidelines for me. I don't know what I am doing wrong.

For practice, I follow A20J ladders. Even today I did solve 5 B problems(but with a lot of errors and submissions ) before the contest but during contest round, I don't know this happened. It will be helpful if someone guide for increasing my accuracy. Please comment if you have anything important note for me.

Thank you