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35 lines
1.4 KiB
Racket
35 lines
1.4 KiB
Racket
#lang br
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(require racket/file rackunit)
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(define passports (for/list ([pstr (string-split (file->string "04.rktd") #rx"\n\n+")])
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(for/hash ([kvstr (string-split pstr)])
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(apply values (string-split kvstr ":")))))
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(define required-fields '("byr" "iyr" "eyr" "hgt" "hcl" "ecl" "pid")) ; "cid" is not required
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(define (passport-keys-valid? p)
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(for*/and ([passport-keys (in-value (hash-keys p))]
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[field required-fields])
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(member field passport-keys)))
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(check-equal? (count passport-keys-valid? passports) 202)
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(define (stringval-in-range str low high)
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(<= low (string->number str) high))
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(define (passport-values-valid? p)
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(and
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(stringval-in-range (hash-ref p "byr") 1920 2002)
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(stringval-in-range (hash-ref p "iyr") 2010 2020)
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(stringval-in-range (hash-ref p "eyr") 2020 2030)
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(let ([hgt (hash-ref p "hgt")])
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(cond
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[(string-suffix? hgt "cm") (stringval-in-range (string-trim hgt "cm") 150 193)]
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[(string-suffix? hgt "in") (stringval-in-range (string-trim hgt "in") 59 76)]
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[else #false]))
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(let ([hcl (hash-ref p "hcl")])
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(and (regexp-match #rx"#......" hcl) (string->number (string-trim hcl "#") 16)))
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(member (hash-ref p "ecl") '("amb" "blu" "brn" "gry" "grn" "hzl" "oth"))
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(let ([pid (hash-ref p "pid")]) (and (= 9 (string-length pid)) (string->number pid)))))
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(check-equal? (count (λ (p) (and (passport-keys-valid? p) (passport-values-valid? p))) passports) 137) |