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Exercise 2 : Permutations A permutation of a sequence ( s 0 , s 1 , dots, s n - 1 ) is a sequence
Exercise : Permutations
A permutation of a sequence dots, is a sequence with the same terms, but in a different order. For example, the sequence admits permutations:
Give a decrease and conquer algorithm to output all permutations of a sequence of distinct elements.
Prove that this algorithm is correct.
Give a recurrence for the runtime of this algorithm.
Solve this recurrence.
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