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30 lines
456 B
C
30 lines
456 B
C
/*++
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Copyright (c) 2006 Microsoft Corporation
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Module Name:
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luby.h
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Abstract:
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<abstract>
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Author:
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Leonardo de Moura (leonardo) 2008-03-04.
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Revision History:
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--*/
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#pragma once
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/**
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\brief Return the i-th element of the Luby sequence: 1,1,2,1,1,2,4,1,1,2,1,1,2,4,8,...
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get_luby(i) = 2^{i-1} if i = 2^k -1
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get_luby(i) = get_luby(i - 2^{k-1} + 1) if 2^{k-1} <= i < 2^k - 1
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*/
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unsigned get_luby(unsigned i);
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