You must justify your answers. – The answers should be concise, clear and neat. – When presenting proofs, every step should be justified --- also use topological sorting

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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– You must justify your answers.

– The answers should be concise, clear and neat.

– When presenting proofs, every step should be justified

--- also use topological sorting

Question 7: Let G (V, E) be a directed acyclic graph, and let s and t be two vertices
of V.
Describe an algorithm that computes, in O(|V|+|E|) time, the number of directed paths
from s to t in G. As always, justify your answer and the running time of your algorithm.
Transcribed Image Text:Question 7: Let G (V, E) be a directed acyclic graph, and let s and t be two vertices of V. Describe an algorithm that computes, in O(|V|+|E|) time, the number of directed paths from s to t in G. As always, justify your answer and the running time of your algorithm.
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