Tags: combinatorics x
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8k1Get the inversion number of a permutationPython / combinatorics, discrete, inversion, math, permutations / by Samuel James Erickson (8 years ago, revision 2)
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11k2Permutation and combination using recursive generatorPython / combinatorics, generators, permutation, recursion / by Shao-chuan Wang (12 years ago, revision 2)