My Advent of Code solutions in Python.
kevinyap.ca/2019/12/going-fast-in-advent-of-code/
advent-of-code
python
Add solution for 2018/02
+293
+41
2018/day02.py
+41
2018/day02.py
···
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import fileinput
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from collections import Counter
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BOXES = [line.strip() for line in fileinput.input()]
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DOUBLES = 0
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TRIPLES = 0
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COMMON = None
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for box_1 in BOXES:
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doubles = 0
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triples = 0
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for char, count in Counter(box_1).items():
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if count == 2:
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doubles += 1
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elif count == 3:
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triples += 1
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if doubles > 0:
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DOUBLES += 1
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if triples > 0:
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TRIPLES += 1
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for box_2 in BOXES:
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if box_1 == box_2:
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continue
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diffs = 0
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for i in range(len(box_1)):
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if box_1[i] != box_2[i]:
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diffs += 1
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if diffs == 1:
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COMMON = ''.join(a for a, b in zip(box_1, box_2) if a == b)
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print "Checksum for list of box IDs:", DOUBLES * TRIPLES
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print "Common letters for right IDs:", COMMON
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2018/inputs/02.txt
+250
2018/inputs/02.txt
···
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