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GATE Computer Science (CS) 2016 Shift 2 Solved Paper

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Question : 51

Total: 65

In an adjacency list representation of an undirected simple graph G = (V, E), each edge (u, v) has two adjacency list entries: [v] in the adjacency list of u, and [u] in the adjacency list of v. These are called twins of each other. A twin pointer is a pointer from an adjacency list entry to its twin. If |E| = m and |V| = n, and the memory size is not a constraint, what is the time complexity of the most efficient algorithm to set the twin pointer in each entry in each adjacency list?

Θ(n²)
Θ(n + m)
Θ(m²)
Θ(n⁴)

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