46 lines
1.0 KiB
Python
46 lines
1.0 KiB
Python
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#!/usr/bin/env python
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def read_input():
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with open('input.txt', 'r') as f:
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data = f.read().splitlines()
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return data[0]
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def find_longest_match(polymer):
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result = 1
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for x in range(len(polymer)-1):
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if abs(ord(polymer[x]) - ord(polymer[x+1])) != 32:
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break
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result += 1
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return result
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def retract_polymer(polymer):
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parsing_pos = 0
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while parsing_pos < len(polymer):
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lm = find_longest_match(polymer[parsing_pos:])
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if lm < 2:
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parsing_pos += 1
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continue
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lm = 2
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if parsing_pos == 0:
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polymer = polymer[lm:]
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else:
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polymer = polymer[:parsing_pos] + polymer[lm+parsing_pos:]
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parsing_pos -= 1
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return len(polymer)
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l = []
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for c in range(ord('a'),ord('z')+1):
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p = read_input()
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if chr(c) not in p:
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continue
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p = p.replace(chr(c), '')
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p = p.replace(chr(c-32), '')
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print("removing characher: {}".format(chr(c)))
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l.append(retract_polymer(p))
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print(min(l))
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