36 lines
1.3 KiB
Nim
36 lines
1.3 KiB
Nim
import streams, strutils, sets, sequtils, sugar, re, tables
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let regexes = toTable({
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"hcl": re"^#[0-9a-f]{6}$",
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"ecl": re"^(amb|blu|brn|gry|grn|hzl|oth)$",
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"pid": re"^\d{9}$",
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"hgt": re"^\d+(cm|in)$",
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"nondec": re"[^0-9]",
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})
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let validators = toTable({
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"hcl": (v: string) => v.match regexes["hcl"],
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"ecl": (v: string) => v.match regexes["ecl"],
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"pid": (v: string) => v.match regexes["pid"],
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"byr": (v: string) => parseInt(v) in 1920..2002,
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"iyr": (v: string) => parseInt(v) in 2010..2020,
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"eyr": (v: string) => parseInt(v) in 2020..2030,
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"hgt": proc (v: string): bool =
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let (mn, mx) = if v.endsWith("cm"): (150, 193) else: (59, 76)
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v.match(regexes["hgt"]) and v.replace(regexes["nondec"]).parseInt in mn..mx,
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"cid": (v: string) => true,
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})
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proc parsePassports(s: Stream): seq[Table[string, string]] =
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s.readAll().split("\n\n").mapIt(it.replace("\n", " ").split(' ')
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.filterIt(it != "").mapIt(it.split(':', 2)).mapIt((it[0], it[1])).toTable)
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proc hasRequiredFields(p: Table[string, string]): bool =
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(toSeq(validators.keys).toHashSet - ["cid"].toHashSet) <= toSeq(p.keys).toHashSet
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proc part1*(s: Stream): int =
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s.parsePassports.countIt(it.hasRequiredFields)
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proc part2*(s: Stream): int =
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s.parsePassports.countIt(it.hasRequiredFields and toSeq(it.pairs).allIt(validators[it[0]](it[1])))
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