Write an efficient backtracking program

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Reference no: EM131361612

A derangement is a permutation p of {1,...,n} such that no item is in its proper position, i.e. pi ≠ i for all 1 ≤ i ≤ n. Write an efficient backtracking program with pruning that constructs all the derangements of n items.

Reference no: EM131361612

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