Codeforces Round #635 (Div. 2) Postmortem

What went well

• A was trivial.
• B was easy.
• I didn't feel stuck when attempting D.

What went poorly

• C took a long time because I didn't realize that I had to consider two criteria for the greedy solution (first Wrong Answer). Then I didn't realize that the two criteria were not mutually exclusive (second Wrong Answer). All said and done, I spent 1h30.

Where I got lucky

• Somehow still above 1700!