20 lines
548 B
Python
20 lines
548 B
Python
#!/usr/bin/env python
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# 2022 - Advent Of Code 6 part 2
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# file = 'input_example.txt'
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file = 'input.txt'
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previous = []
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count = 0
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with open(file, encoding="utf-8") as f:
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signal = f.readline().strip()
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for c in signal:
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count += 1
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if c in previous:
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pos = previous.index(c)
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# print(f'[{count}]{c} already found at {pos}')
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previous = previous[pos+1:]
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elif len(previous) == 13:
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print(f'start of signal found at position {count}')
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break
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previous.append(c)
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