55 lines
1.7 KiB
Python
Executable file
55 lines
1.7 KiB
Python
Executable file
#!/usr/bin/env python
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def within(a, b, x):
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return a <= x <= b
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PASSPORT_FIELDS = {
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'byr': lambda s: len(s) == 4 and within(1920, 2002, int(s)),
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'iyr': lambda s: len(s) == 4 and within(2010, 2020, int(s)),
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'eyr': lambda s: len(s) == 4 and within(2020, 2030, int(s)),
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'hgt': lambda s: within(*{'cm': (150, 193), 'in': (59, 76)}[s[-2:]], int(s[:-2])),
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'hcl': lambda s: len(s) == 7 and s[0] == '#' and all(c in "0123456789abcdef" for c in s[1:]),
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'ecl': lambda s: s in ('amb', 'blu', 'brn', 'gry', 'grn', 'hzl', 'oth'),
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'pid': lambda s: len(s) == 9 and s.isdigit(),
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}
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def parse_passport(line):
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d = {}
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for entry in line.split():
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k, v = entry.split(':', maxsplit=1)
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d[k] = v
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return d
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def check_passport_fields_exist(passport):
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return set(PASSPORT_FIELDS.keys()) <= set(passport.keys())
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def check_passport_fields_valid(passport):
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for name, spec in PASSPORT_FIELDS.items():
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try:
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valid = spec(passport[name])
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except:
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valid = False
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if not valid:
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return False
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return True
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def split_on(f, it):
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current_part = []
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for el in it:
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if f(el):
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yield current_part
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current_part = []
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else:
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current_part.append(el)
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if __name__ == '__main__':
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with open('input.txt', 'r') as f:
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lines = [line.strip() for line in f.readlines()]
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specs = list(' '.join(lines) for lines in split_on(lambda l: l == "", lines))
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passports = [parse_passport(spec) for spec in specs]
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print(len(list(filter(check_passport_fields_exist, passports))))
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print(len(list(filter(check_passport_fields_valid, passports))))
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