About: Floyd–Rivest algorithm

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In computer science, the Floyd-Rivest algorithm is a selection algorithm developed by Robert W. Floyd and Ronald L. Rivest that has an optimal expected number of comparisons within lower-order terms. It is functionally equivalent to quickselect, but runs faster in practice on average. It has an expected running time of O(n) and an expected number of comparisons of n + min(k, n − k) + O(n1/2 log1/2 n).

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  • In computer science, the Floyd-Rivest algorithm is a selection algorithm developed by Robert W. Floyd and Ronald L. Rivest that has an optimal expected number of comparisons within lower-order terms. It is functionally equivalent to quickselect, but runs faster in practice on average. It has an expected running time of O(n) and an expected number of comparisons of n + min(k, n − k) + O(n1/2 log1/2 n). The algorithm was originally presented in a Stanford University technical report containing two papers, where it was referred to as SELECT and paired with PICK, or median of medians. It was subsequently published in Communications of the ACM, Volume 18: Issue 3. (en)
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  • Floyd–Rivest (en)
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  • In computer science, the Floyd-Rivest algorithm is a selection algorithm developed by Robert W. Floyd and Ronald L. Rivest that has an optimal expected number of comparisons within lower-order terms. It is functionally equivalent to quickselect, but runs faster in practice on average. It has an expected running time of O(n) and an expected number of comparisons of n + min(k, n − k) + O(n1/2 log1/2 n). (en)
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  • Floyd–Rivest algorithm (en)
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