In this problem you will design an algorithm that takes as input a directed acyclic graph G two vertices s and t, and returns the number of simple paths from s tot in G. = (V,E) and For example, the directed acyclic graph below contains exactly four simple paths from vertex p to vertex v: pov, poryv, posryv, and psryv. Notice: your algorithm needs only to count the simple paths, not list them. m W
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