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Applying depth - first search algorithm to input directed graph that has loops then: a . If you have a forward edge, then you must
Applying depthfirst search algorithm to input directed graph that has loops then:
a If you have a forward edge, then you must have a cycle
b If you have a back edge, then you must have a cycle
c If you have a forward edge, then you may have a cycle
d If you have a back edge, then you may have a cycle
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