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# Day Four: Passport Processing
import os, strutils
let input: string = paramStr(1)
var fieldedPassports, validPassports: int = 0
for passport in input.readFile().split("\n\n"):
var fields, valid: int = 0
for pairs in passport.replace("\n", " ").strip().split(" "):
let
key: string = pairs.split(":")[0]
value: string = pairs.split(":")[1]
case key
of "byr":
if parseInt(value) in 1920 .. 2002:
inc(valid)
of "iyr":
if parseInt(value) in 2010 .. 2020:
inc(valid)
of "eyr":
if parseInt(value) in 2020 .. 2030:
inc(valid)
of "hgt":
let
units: string = value[^2..^1]
height: string = value[0..^3]
if units == "cm" and parseInt(height) in 150 .. 193:
inc(valid)
elif units == "in" and parseInt(height) in 59 .. 76:
inc(valid)
of "hcl":
block hex:
for char in value[1..^1]:
if char notin {'0'..'9', 'a'..'f'}:
break hex
if value[0] == '#':
inc(valid)
of "ecl":
if value in ["amb", "blu", "brn", "gry", "grn", "hzl", "oth"]:
inc(valid)
of "pid":
if len(value) == 9:
inc(valid)
else:
dec(fields)
inc(fields)
if fields >= 7:
inc(fieldedPassports)
if valid >= 7:
inc(validPassports)
echo fieldedPassports
echo validPassports
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