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by nopinsight 6146 days ago
Although this guy is young, he's been at it several times. He is likely one of the most experienced among contestants.

I think it is a good example of 'practice makes perfect' and '10,000-hour rule' for world-class expertise building. (If you count all the hours with math training as well--though I don't know how much time he spent on math & com sci together.)