22 lines
559 B
Python
22 lines
559 B
Python
with open('day5-input', 'r') as file:
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data = [l.strip('\n') for l in file]
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polymer = [c for c in data[0]]
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# polymer = [c for c in 'dabAcCaCBAcCcaDA']
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def react(poly):
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i = 0
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while i < len(poly)-1:
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if poly[i] == poly[i+1].swapcase():
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poly.pop(i+1)
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poly.pop(i)
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i = max(i-1, 0)
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else:
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i += 1
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return poly
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print(len(react(list(polymer)))) # Part 1
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remaining_letters = set(c.lower() for c in polymer)
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removals = [len(react([c for c in polymer if c.lower() != i])) for i in remaining_letters]
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print(min(removals)) # Part 2
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