algorithm - Fast Convertion From Adjacency List to Edge List -


i have undirected weighted graph implemented adjacency list need convert edge list. problem is, each edge (a, b), have 2 entries in adjacency list: 1 indicating edge b , other b. so, while converting edge list, need search whole partially completed edge list prevent duplicates.

is there way can make faster/ less complicated? need keep adjacency list because algorithm of detecting cycles in graph relies on it.

enumerate vertices add list edges (u, v) such u <= v.


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