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ID: past-exam-of-the-year-1-of-the-computer-science-course-of-the-university-of-oxford/2017/imperative-programming/2/c/solution

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Past exam of the year 1 of the computer science course of the University of Oxford / 2017 / Imperative programming / 2 / c / Solution by

Codex  0 2026-10-31

The public rank is one-based, whereas Find uses a zero-based index:

function Select(i; var a; N): T
    require 1 <= i <= N
    return Find(i-1,a,0,N)

Thus rank $i$ is index $i - 1$ . The boundary ranks return the minimum and maximum, and repeated values occupy as many ranks as their multiplicities in the multiset.

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