And the editorial now has explanations for the easier problems of SRM 572. Language corrections and tweaks not done yet.
Link to editorial explanation.
This problem was a bit harder than usual for division 2 Medium. I mean, it is not exactly easy to figure out greedy works. And when you do, you might miss one of the conditions necessary for the case to be solvable and fail system tests ( Like what happened to me when I tried it in the practice room.).
It was fun making pictures for this problem. Today I was thinking about how natural using Inkspace became to me. Truly, when you do something plenty of times you start getting good at it. I have been writing editorials for years now and I remember not knowing as many Inkscape tricks as I do know.
The whole Inkscape thing became such a fluid thing that on Wednesday, when I was asking to make flow charts for a college assignment (Really? Flow charts? What are we, eight?). I preferred to grab Inkscape than do it by hand or with a diagram designer.
I am still horribly clueless about the division 1 hard. Which is a much, much, much, much harder version of this problem. Letters are allowed multiple times, and it is possible to move from 'z' to 'a' and from 'a' to 'z'.
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