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29 lines
677 B
Nim
29 lines
677 B
Nim
discard """
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output: "500"
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"""
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import threadpool, sequtils
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{.experimental.}
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proc linearFind(a: openArray[int]; x, offset: int): int =
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for i, y in a:
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if y == x: return i+offset
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result = -1
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proc parFind(a: seq[int]; x: int): int =
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var results: array[4, int]
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parallel:
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if a.len >= 4:
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let chunk = a.len div 4
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results[0] = spawn linearFind(a[0 ..< chunk], x, 0)
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results[1] = spawn linearFind(a[chunk ..< chunk*2], x, chunk)
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results[2] = spawn linearFind(a[chunk*2 ..< chunk*3], x, chunk*2)
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results[3] = spawn linearFind(a[chunk*3 ..< a.len], x, chunk*3)
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result = max(results)
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let data = toSeq(0..1000)
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echo parFind(data, 500)
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