2020-12-05 23:10:59 -06:00
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import streams, sets, strutils, sequtils
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proc part1*(s: Stream): int =
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s.readAll().split("\n\n").mapIt(it.split("\n").foldl(a.union(b.toHashSet), initHashSet[char]()).len).foldl(a + b)
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proc part2*(s: Stream): int =
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2020-12-05 23:20:53 -06:00
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s.readAll().split("\n\n").mapIt(
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it.split("\n").filterIt(it != "").foldl(a.intersection(b.toHashSet), "abcdefghijklmnopqrstuvwxyz".toHashSet()).len
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).foldl(a + b)
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