Created
December 4, 2020 15:05
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| use crate::common::Solution; | |
| use std::collections::BTreeMap; | |
| type PassportInformation<'a> = BTreeMap<&'a str,&'a str>; | |
| pub fn solve(lines: &[String]) -> Solution { | |
| let s = lines.join("\n"); | |
| let passports: Vec<PassportInformation> = s.split("\n\n") | |
| .map(|pwd_fields| pwd_fields | |
| .split_whitespace() | |
| .map(|s: &str| -> (&str, &str) { | |
| let i = s.find(':').unwrap(); | |
| (&s[..i], &s[(i+1)..]) | |
| }) | |
| .collect()) | |
| .collect(); | |
| let required_fields = ["hcl","ecl","iyr","byr","pid","hgt","eyr"]; | |
| let passports_with_all_required_fields: Vec<PassportInformation> = passports.into_iter() | |
| .filter(|pwd| required_fields.iter().all(|c| pwd.contains_key(c))) | |
| .collect(); | |
| let number_of_valid_passports = passports_with_all_required_fields.iter() | |
| .filter(|passport_info| { | |
| let h_spec = passport_info["hgt"]; | |
| let mut hcl = passport_info["hcl"].bytes(); | |
| passport_info["hcl"].len() == 7 && | |
| hcl.next() == Some(b'#') && | |
| hcl.all(|c| c.is_ascii_hexdigit()) && | |
| matches!(passport_info["byr"].parse::<i64>(), Ok(b) if 1920 <= b && b <= 2002) && | |
| matches!(passport_info["iyr"].parse::<i64>(), Ok(i) if 2010 <= i && i <= 2020) && | |
| matches!(passport_info["eyr"].parse::<i64>(), Ok(e) if 2020 <= e && e <= 2030) && | |
| passport_info["pid"].len() == 9 && | |
| passport_info["pid"].bytes().all(|c| c.is_ascii_digit()) && | |
| ["amb", "blu", "brn", "gry", "grn", "hzl", "oth"].contains(&passport_info["ecl"]) && | |
| ((h_spec.ends_with("in") && | |
| matches!(h_spec[0..(h_spec.len()-2)].parse::<u32>(), Ok(h) if h >= 59 && h <= 76)) || | |
| (h_spec.ends_with("cm") && | |
| matches!(h_spec[0..(h_spec.len()-2)].parse::<u32>(), Ok(h) if h >= 150 && h <= 193))) | |
| }) | |
| .count(); | |
| Solution { | |
| part_1: passports_with_all_required_fields.len().to_string(), | |
| part_2: number_of_valid_passports.to_string() | |
| } | |
| } |
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