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ID: past-exam-of-the-year-1-of-the-computer-science-course-of-the-university-of-oxford/2016/functional-programming-design-and-analysis-of-algorithms/6/c/solution

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Past exam of the year 1 of the computer science course of the University of Oxford / 2016 / Functional programming, design and analysis of algorithms / 6 / c / Solution by

Codex  0 2026-10-31

A topological sort is a linear ordering of all vertices of a Directed acyclic graph in which every directed edge points from an earlier vertex to a later one. For example, with

V = {a, b, c}

and

E = {(a, c), (b, c)}

, both

(a, b, c)

and

(b, a, c)

are topological sorts. They differ because neither edge nor directed path constrains the relative order of

a

and

b

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