Educational Codeforces Round 80 Postmortem

What went well

• The contest was so hard that I really wanted to quit after reading A, but persevered to the end. Somehow I solved three problems…

What went poorly

• I'm terrible with floors and ceilings. I'm also apparently bad at quickly recognizing monotonic functions.
• I'm also bad at bijecting problems; I did not recognize during the contest that C was asking for a monotonically increasing sequence of length 2n, rather than two sequences of length n with weird constraints on elements.

Where I got lucky

• Solving three problems with a high penalty only cost 8 elo.