Challenge: Detect a Cycle in a Graph
Solve the challenge of detecting a cycle in a graph.
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Problem statement
The concept of loops or cycles is very common in graph theory. A cycle exists when we traverse the graph and come upon a vertex that has already been visited.
Implement the DetectCycle function, which tells us whether or not a graph contains a cycle.
Input
A graph.
Output
Return true if a cycle exists and false if it doesn’t.
Sample input
Graph:
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