| 1 | (asdf:load-system :adventofcode2020) |
| 2 | (in-package #:adventofcode2020) |
| 3 | (named-readtables:in-readtable fn-reader) |
| 4 | |
| 5 | (defun parse-passport (str-list) |
| 6 | (flet ((parser (str) |
| 7 | (->> (split-sequence #\Space str) |
| 8 | (mapcar (fn* (destructuring-bind (a b) (split-sequence #\: _) |
| 9 | (list (read-from-string a) b))))))) |
| 10 | (mapcan #'parser str-list))) |
| 11 | |
| 12 | (defun four-digits-test (pred) |
| 13 | (lambda (s) |
| 14 | (cl-ppcre:register-groups-bind |
| 15 | ((#'parse-integer value)) ("^([0-9]{4})$" s) |
| 16 | (funcall pred value)))) |
| 17 | |
| 18 | (defparameter *required-field-tests* |
| 19 | (list 'byr (four-digits-test λ(<= 1920 _ 2002)) |
| 20 | 'iyr (four-digits-test λ(<= 2010 _ 2020)) |
| 21 | 'eyr (four-digits-test λ(<= 2020 _ 2030)) |
| 22 | 'hgt λ(cl-ppcre:register-groups-bind |
| 23 | ((#'parse-integer value) unit) ("^([0-9]+)(in|cm)$" _) |
| 24 | (cond |
| 25 | ((string= unit "in") (<= 59 value 76)) |
| 26 | ((string= unit "cm") (<= 150 value 193)) |
| 27 | (t nil))) |
| 28 | 'hcl λ(cl-ppcre:scan "^#[0-9a-f]{6}$" _) |
| 29 | 'ecl λ(cl-ppcre:scan "^(amb|blu|brn|gry|grn|hzl|oth)$" _) |
| 30 | 'pid λ(cl-ppcre:scan "^[0-9]{9}$" _) |
| 31 | 'cid (constantly t))) |
| 32 | |
| 33 | (defun simple-validate-passport (passport) |
| 34 | (let ((required-fields '(byr iyr eyr hgt hcl ecl pid))) |
| 35 | (every #'identity (mapcar λ(assoc _ passport) required-fields)))) |
| 36 | |
| 37 | (defun complex-validate-passport (passport) |
| 38 | (flet ((check (pair) |
| 39 | (destructuring-bind (field value) pair |
| 40 | (funcall (getf *required-field-tests* field) value)))) |
| 41 | (and |
| 42 | (simple-validate-passport passport) |
| 43 | (every #'identity (mapcar #'check passport))))) |
| 44 | |
| 45 | (day 04 input |
| 46 | (let ((passports (-<>> (list-from input) |
| 47 | (split-sequence "" <> :test #'string=) |
| 48 | (mapcar #'parse-passport)))) |
| 49 | (part1 (count t (mapcar #'simple-validate-passport passports))) |
| 50 | (part2 (count t (mapcar #'complex-validate-passport passports))))) |
| 51 | |
| 52 | (def-suite day04) |
| 53 | (in-suite day04) |
| 54 | |
| 55 | (defvar *passports* |
| 56 | '(("ecl:gry pid:860033327 eyr:2020 hcl:#fffffd" |
| 57 | "byr:1937 iyr:2017 cid:147 hgt:183cm") |
| 58 | ("iyr:2013 ecl:amb cid:350 eyr:2023 pid:028048884" |
| 59 | "hcl:#cfa07d byr:1929") |
| 60 | ("hcl:#ae17e1 iyr:2013" "eyr:2024" |
| 61 | "ecl:brn pid:760753108 byr:1931" "hgt:179cm") |
| 62 | ("hcl:#cfa07d eyr:2025 pid:166559648" |
| 63 | "iyr:2011 ecl:brn hgt:59in"))) |
| 64 | |
| 65 | (test parse-passports |
| 66 | (is (equal |
| 67 | '(((ecl "gry") (pid "860033327") (eyr "2020") (hcl "#fffffd") (byr "1937") |
| 68 | (iyr "2017") (cid "147") (hgt "183cm")) |
| 69 | ((iyr "2013") (ecl "amb") (cid "350") (eyr "2023") (pid "028048884") |
| 70 | (hcl "#cfa07d") (byr "1929")) |
| 71 | ((hcl "#ae17e1") (iyr "2013") (eyr "2024") (ecl "brn") (pid "760753108") |
| 72 | (byr "1931") (hgt "179cm")) |
| 73 | ((hcl "#cfa07d") (eyr "2025") (pid "166559648") (iyr "2011") (ecl "brn") |
| 74 | (hgt "59in"))) |
| 75 | (mapcar #'parse-passport *passports*)))) |
| 76 | |
| 77 | (test simple-validate-passports |
| 78 | (is (equal |
| 79 | '(t nil t nil) |
| 80 | (mapcar (compose #'simple-validate-passport #'parse-passport) *passports*)))) |
| 81 | |
| 82 | (test passport-field-validators |
| 83 | (flet ((check (pair) |
| 84 | (destructuring-bind (field value) pair |
| 85 | (funcall (getf *required-field-tests* field) value)))) |
| 86 | (is-true (check '(byr "2002"))) |
| 87 | (is-false (check '(byr "2003"))) |
| 88 | |
| 89 | (is-true (check '(hgt "60in"))) |
| 90 | (is-true (check '(hgt "190cm"))) |
| 91 | (is-false (check '(hgt "190in"))) |
| 92 | (is-false (check '(hgt "190"))) |
| 93 | |
| 94 | (is-true (check '(hcl "#123abc"))) |
| 95 | (is-false (check '(hcl "#123abz"))) |
| 96 | (is-false (check '(hcl "123abc"))) |
| 97 | |
| 98 | (is-true (check '(ecl "brn"))) |
| 99 | (is-false (check '(ecl "wat"))) |
| 100 | |
| 101 | (is-true (check '(pid "000000001"))) |
| 102 | (is-false (check '(pid "0123456789"))))) |
| 103 | |
| 104 | (defvar *valid-passports* |
| 105 | '(((pid "087499704") (hgt "74in") (ecl "grn") (iyr "2012") (eyr "2030") |
| 106 | (byr "1980") (hcl "#623a2f")) |
| 107 | ((eyr "2029") (ecl "blu") (cid "129") (byr "1989") (iyr "2014") |
| 108 | (pid "896056539") (hcl "#a97842") (hgt "165cm")) |
| 109 | ((hcl "#888785") (hgt "164cm") (byr "2001") (iyr "2015") (cid "88") |
| 110 | (pid "545766238") (ecl "hzl") (eyr "2022")) |
| 111 | ((iyr "2010") (hgt "158cm") (hcl "#b6652a") (ecl "blu") (byr "1944") |
| 112 | (eyr "2021") (pid "093154719")))) |
| 113 | |
| 114 | (defvar *invalid-passports* |
| 115 | '(((eyr "1972") (cid "100") (hcl "#18171d") (ecl "amb") (hgt "170") |
| 116 | (pid "186cm") (iyr "2018") (byr "1926")) |
| 117 | ((iyr "2019") (hcl "#602927") (eyr "1967") (hgt "170cm") (ecl "grn") |
| 118 | (pid "012533040") (byr "1946")) |
| 119 | ((hcl "dab227") (iyr "2012") (ecl "brn") (hgt "182cm") (pid "021572410") |
| 120 | (eyr "2020") (byr "1992") (cid "277")) |
| 121 | ((hgt "59cm") (ecl "zzz") (eyr "2038") (hcl "74454a") (iyr "2023") |
| 122 | (pid "3556412378") (byr "2007")))) |
| 123 | |
| 124 | (test complex-validate-passports |
| 125 | (loop for passport in *valid-passports* |
| 126 | do (is-true (complex-validate-passport passport))) |
| 127 | (loop for passport in *invalid-passports* |
| 128 | do (is-false (complex-validate-passport passport)))) |
| 129 | |
| 130 | (run! 'day04) |