13 lines
228 B
Python
13 lines
228 B
Python
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def van_eck():
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n = 0
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seen = [0]
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val = 0
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while True:
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yield val
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if val in seen[1:]:
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val = seen.index(val, 1)
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else:
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val = 0
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seen.insert(0, val)
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n += 1
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