65 lines
1.7 KiB
Python
65 lines
1.7 KiB
Python
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#!/usr/bin/env python
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# look for: northpole object storage
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import re
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import argparse
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RE_LINE = re.compile(r'^([a-z\-]+)\-(\d+)\[([a-z]+)\]$')
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def load_file(filename):
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with open(filename) as f:
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for line in f:
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yield line.strip()
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def check_room_code(room):
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chars = dict()
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# count chars
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for char in room['name']:
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if char not in chars:
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chars[char] = 0
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chars[char] += 1
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del chars['-']
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# sort by
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chars = [(k,v) for k,v in chars.items()]
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chars = sorted(chars, key=lambda x: (-x[1], x[0]))
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# get checksum
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checksum = "".join([x[0] for x in chars])[0:5]
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if checksum == room['checksum']:
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return 1
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return 0
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def decrypt_room_name(room):
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room_name = ""
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shift = room['sector'] % 26
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for char in room['name']:
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if char == '-':
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room_name = "{}{}".format(room_name, ' ')
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else:
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new = chr(((ord(char) - ord('a') + shift) % 26) + ord('a'))
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room_name = "{}{}".format(room_name, new)
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room['name_decrypted'] = room_name
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def main(args):
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for ROOM in load_file(args.input):
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match = re.search(RE_LINE, ROOM)
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if not match:
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print("{} syntax error".format(ROOM))
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continue
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room_data = {
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'name': match.group(1),
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'sector': int(match.group(2)),
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'checksum': match.group(3)
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}
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decrypt_room_name(room_data)
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print(room_data)
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if __name__ == "__main__":
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parser = argparse.ArgumentParser(description='AdventOfCode 2016 Day 01')
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parser.add_argument('--input', '-i', action='store', required=True, help='input file')
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args = parser.parse_args()
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main(args)
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