17 lines
271 B
Text
17 lines
271 B
Text
func van_eck(n) {
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var seen = Hash()
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var seq = [0]
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var prev = seq[-1]
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for k in (1 ..^ n) {
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seq << (seen.has(prev) ? (k - seen{prev}) : 0)
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seen{prev} = k
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prev = seq[-1]
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}
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seq
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}
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say van_eck(10)
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say van_eck(1000).last(10)
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