Question: A digraph is a graph with directions on its edges. The topological sorting problem asks to list vertices of a digraph in an order such

A digraph is a graph with directions on its edges. The topological sorting problem asks to list vertices of a digraph in an order such that for every edge of the digraph, the vertex it starts at is listed before the vertex it points to

.

This problem has a solution if and only if a digraph is a dag

(

directed acyclic graph

),

.

.,

it has no directed cycles.True

/

False

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