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Visnu Pitiyanuvath
Published
Advent of Code 2020
Edited
Dec 12, 2020
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1 star
Advent of Code 2020
Day 1: Report RepairDay 2: Password PhilosophyDay 3: Toboggan TrajectoryDay 4: Passport ProcessingDay 5: Binary Boarding
Day 6: Custom Customs
Day 7: Handy HaversacksDay 8: Handheld HaltingDay 9: Encoding ErrorDay 10: Adapter ArrayDay 11: Seating SystemDay 12: Rain RiskDay 13: Shuttle SearchDay 14: Docking DataDay 15: Rambunctious RecitationDay 16: Ticket TranslationDay 17: Conway CubesDay 18: Operation OrderDay 19: Monster MessagesDay 25: Combo BreakerAdvent of Code Leaderboard 2020
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groups = input.trim().split('\n\n').map(g => g.split('\n'))
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part1 = groups.map(g => new Set(g.flatMap(s => s.split(''))))
.reduce((sum, set) => sum + set.size, 0)
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part2 = groups.map(g => g.map(s => new Set(s.split(''))))
.map(g => g.reduce((r, s) => intersect(r, new Set(s))))
.reduce((sum, set) => sum + set.size, 0)
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intersect = (s1, s2) => new Set(Array.from(s1).filter(x => s2.has(x)))
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Insert cell
Insert cell

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