PYTHON PROBLEM 309 · Advanced

Find a redundant graph edge: Triangle cycle

Find the final edge that closes a cycle in an almost-tree graph.

union-find · cycle · LeetCode patternunion-findcycleLeetCode pattern

PROBLEM OVERVIEW

What this Python exercise asks you to practise

This scenario tests find a redundant graph edge. It belongs to the Graphs and Connectivity roadmap and uses the union-find · cycle · leetcode pattern pattern.

Graph representation, BFS, DFS, shortest paths, topological order, and union-find.

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SKILL TO CARRY FORWARD

Pattern relevance

This exercise strengthens union-find · cycle · leetcode pattern. Be ready to explain the input, the rule, the boundary cases, and why the chosen approach is appropriate.