23 June 2020

Codeforces Round #652 (Div. 2) Postmortem

What went well
  • 0:00 submission for A!
  • Got ABCD (albeit slowly).
What went poorly
  • Incurred one wrong answer for B and C each (and took a long time too).
  • Took half an hour to recognize the recursion for the tree structure in D.
  • Thought that the residues of numbers compare the same way as the the numbers themselves (i.e. a > b implies (a % m) > (b % m)…no, just no).
Where I got lucky
  • Got D with 9 minutes to go, which involved a slight wild guess.

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