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Grokking the Coding Interview Patterns in Go

Redundant Connection

Explore how to detect and remove a redundant connection in an undirected graph containing a single cycle, using Union Find. Understand how to return the last edge that creates a cycle to transform the graph into a tree structure.

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Statement

We’re given an undirected graph consisting of nn nodes. The graph is represented as an array called edges, of length nn, where edges[i] = [a, b] indicates that there is an edge between nodes a and b in the graph.

Return an edge that can be removed to make the graph a treeA tree is an undirected graph that is connected and has no cycles. of nn ...