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C++ arbitrary two-dimensional magic square
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Application background In a square is composed of a plurality of rows of number, arbitrary graph a transverse, longitudinal and diagonal of a few numbers and are equal, with charts of this nature, called "magic square". In ancient China, known as the "riverside", "Luo Shu", also called "the aspect graph".
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C++ implementation to generate a combination algor
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Application background Basic concepts of combination ; set S = {1,2,...... N}, all elements of a set of collections (not to consider the order of the arrangement), known as the whole combination of S; ; set S = {1,2,...... N}, from which to select r elements to form a group (do not consider the order of the arrangement), known as the S of a r- combination.Generating portfolio includes: all combination and r- combination. All the combination of the algorithm, based on 2 of the dictionary order, Even algorithm, recursive algorithm; r- combination of the algorithm has a dictionary order generation algorithm. ; 3 of all combinations ; 4 of all combinations
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