Redundant Connection
Given edges of a graph that started as a tree with one additional edge added Return an edge that can be removed to make it a tree again If multiple answers exist, return the one that occurs last in the input Example: [[1,2],[1,3],[2,3]] => [2,3]
This is really about exploring a state space without revisiting the same work. Interviewers love it because it reveals your traversal modeling and your edge-case discipline. Once your traversal structure is solid, you can reuse it across dozens of problems.
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