I have been trying for months, I get close enough, but then somehow fail to reach the threshold. I am able to solve question but I can do them fast enough.
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Try to do more virtual participations to improve your speed. I also suggest you to create a mashup, add here ~10 random problems with difficulty level from 1000 to 1400, and try to solve them as fast as possible.
Tell how I can improve brother
he has literally explained it..