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Quicksort is an efficient, general-purpose sorting algorithm. Quicksort was developed by British computer scientist Tony Hoare in 1959 [1] and published in 1961. [2] It is still a commonly used algorithm for sorting. Overall, it is slightly faster than merge sort and heapsort for randomized data, particularly on larger distributions. [3]
Tony Hoare was born in Colombo, Ceylon (now Sri Lanka) to British parents; his father was a colonial civil servant and his mother was the daughter of a tea planter. Hoare was educated in England at the Dragon School in Oxford and the King's School in Canterbury. [11] He then studied Classics and Philosophy ("Greats") at Merton College, Oxford. [12]
In computer science, quickselect is a selection algorithm to find the kth smallest element in an unordered list, also known as the kth order statistic.Like the related quicksort sorting algorithm, it was developed by Tony Hoare, and thus is also known as Hoare's selection algorithm. [1]
Quicksort was discovered by Tony Hoare in 1959, and subsequently published in 1961. [4] In the same year, Hoare published the quickselect algorithm, [5] which finds the median element of a list in linear expected time. It remained open until 1973 whether a deterministic linear-time algorithm existed.
Quickselect was presented without analysis by Tony Hoare in 1965, [41] and first analyzed in a 1971 technical report by Donald Knuth. [11] The first known linear time deterministic selection algorithm is the median of medians method, published in 1973 by Manuel Blum, Robert W. Floyd, Vaughan Pratt, Ron Rivest, and Robert Tarjan. [5]
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Hoare, C. A. R. Developed the formal language Communicating Sequential Processes (CSP), Hoare logic for verifying program correctness, and Quicksort; fundamental contributions to the definition and design of programming languages 1968 Holberton, Betty: Wrote the first mainframe sort merge on the Univac: 1889 Hollerith, Herman
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