Grokking the Coding Interview: Patterns for Coding Questions
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Graph as an Abstract Data Type (ADT)

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Anonymous

· 3 years ago

Note :- Had obtained this explaination from Co-Pilot, Hence kindly double check before grasping it blindly

The Pair class in this code is used to represent an edge in the graph. Each edge is a pair of vertices, and the Pair class is a convenient way to group these two vertices together.

While it's true that you can use a List<Integer> to represent the adjacency list of a vertex, it's not as convenient or intuitive to use a List<Integer> to represent an edge. An edge is a connection between two specific vertices, and the order of the vertices matters. A Pair makes it clear that you're dealing with two specific, ordered items.

Let's consider an example. Suppose you have a graph with vertices 1, 2, and 3, and edges (1, 2) and (2, 3). The adjacency list representation of th

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