public static int GetDay04Part01Answer() { // --- Day 4: Passport Processing --- // You arrive at the airport only to realize that you grabbed your North Pole Credentials instead of your passport.While these documents are extremely similar, North Pole Credentials aren't issued by a country and therefore aren't actually valid documentation for travel in most of the world. // It seems like you're not the only one having problems, though; a very long line has formed for the automatic passport scanners, and the delay could upset your travel itinerary. // Due to some questionable network security, you realize you might be able to solve both of these problems at the same time. // The automatic passport scanners are slow because they're having trouble detecting which passports have all required fields. The expected fields are as follows: // byr(Birth Year) // iyr(Issue Year) // eyr(Expiration Year) // hgt(Height) // hcl(Hair Color) // ecl(Eye Color) // pid(Passport ID) // cid(Country ID) // Passport data is validated in batch files(your puzzle input).Each passport is represented as a sequence of key:value pairs separated by spaces or newlines.Passports are separated by blank lines. // Here is an example batch file containing four passports: // ecl:gry pid:860033327 eyr:2020 hcl:#fffffd // byr:1937 iyr:2017 cid:147 hgt:183cm // iyr:2013 ecl:amb cid:350 eyr:2023 pid:028048884 // hcl:#cfa07d byr:1929 // hcl:#ae17e1 iyr:2013 // eyr:2024 // ecl:brn pid:760753108 byr:1931 // hgt:179cm // hcl:#cfa07d eyr:2025 pid:166559648 // iyr:2011 ecl:brn hgt:59in // The first passport is valid - all eight fields are present.The second passport is invalid - it is missing hgt (the Height field). // The third passport is interesting; the only missing field is cid, so it looks like data from North Pole Credentials, not a passport at all! Surely, nobody would mind if you made the system temporarily ignore missing cid fields. Treat this "passport" as valid. // The fourth passport is missing two fields, cid and byr.Missing cid is fine, but missing any other field is not, so this passport is invalid. // According to the above rules, your improved system would report 2 valid passports. // Count the number of valid passports -those that have all required fields.Treat cid as optional.In your batch file, how many passports are valid? // Answer: 228 var passports = GetDay04Input(); var numberOfValidPassports = PassportHelper.GetNumberOfValidPassports(passports, PassportPolicyPart01); return(numberOfValidPassports); }
public static int GetDay04Part02Answer() { // --- Part Two --- // The line is moving more quickly now, but you overhear airport security talking about how passports with invalid data are getting through. Better add some data validation, quick! // You can continue to ignore the cid field, but each other field has strict rules about what values are valid for automatic validation: // byr(Birth Year) - four digits; at least 1920 and at most 2002. // iyr(Issue Year) - four digits; at least 2010 and at most 2020. // eyr(Expiration Year) - four digits; at least 2020 and at most 2030. // hgt(Height) - a number followed by either cm or in: // If cm, the number must be at least 150 and at most 193. // If in, the number must be at least 59 and at most 76. // hcl(Hair Color) - a # followed by exactly six characters 0-9 or a-f. // ecl(Eye Color) - exactly one of: amb blu brn gry grn hzl oth. // pid(Passport ID) - a nine - digit number, including leading zeroes. // cid(Country ID) - ignored, missing or not. // Your job is to count the passports where all required fields are both present and valid according to the above rules. Here are some example values: // byr valid: 2002 // byr invalid: 2003 // hgt valid: 60in // hgt valid: 190cm // hgt invalid: 190in // hgt invalid: 190 // hcl valid: #123abc // hcl invalid: #123abz // hcl invalid: 123abc // ecl valid: brn // ecl invalid: wat // pid valid: 000000001 // pid invalid: 0123456789 // Here are some invalid passports: // eyr: 1972 cid: 100 // hcl:#18171d ecl:amb hgt:170 pid:186cm iyr:2018 byr:1926 // // iyr: 2019 // hcl:#602927 eyr:1967 hgt:170cm // ecl: grn pid:012533040 byr: 1946 // // hcl: dab227 iyr:2012 // ecl: brn hgt:182cm pid:021572410 eyr: 2020 byr: 1992 cid: 277 // // hgt: 59cm ecl:zzz // eyr:2038 hcl: 74454a iyr:2023 // pid: 3556412378 byr: 2007 // Here are some valid passports: // // pid: 087499704 hgt: 74in ecl: grn iyr:2012 eyr: 2030 byr: 1980 // hcl:#623a2f // // eyr: 2029 ecl: blu cid:129 byr: 1989 // iyr: 2014 pid: 896056539 hcl:#a97842 hgt:165cm // // hcl:#888785 // hgt: 164cm byr:2001 iyr: 2015 cid: 88 // pid: 545766238 ecl: hzl // eyr:2022 // // iyr: 2010 hgt: 158cm hcl:#b6652a ecl:blu byr:1944 eyr:2021 pid:093154719 // Count the number of valid passports -those that have all required fields and valid values. Continue to treat cid as optional.In your batch file, how many passports are valid? // Answer: 175 var passports = GetDay04Input(); var numberOfValidPassports = PassportHelper.GetNumberOfValidPassports(passports, PassportPolicyPart02); return(numberOfValidPassports); }