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HTTP/2 200 date: Tue, 14 Oct 2025 15:39:25 GMT content-type: text/html; charset=utf-8 content-encoding: gzip cache-control: public, max-age=86400 referrer-policy: strict-origin-when-cross-origin x-app-version: v251012-rb-251014-1002 x-content-type-options: nosniff x-frame-options: SAMEORIGIN x-xss-protection: 1; mode=block x-middleware-rewrite: /coursesv2/grokking-coding-interview-in-python/solution-redundant-connection vary: RSC, Next-Router-State-Tree, Next-Router-Prefetch, Accept-Encoding x-nextjs-cache: HIT etag: W/"ans4s7l9qhevp7" x-cloud-trace-context: ec3c6a2d806c8b3b9b7dbae3a4733c8f via: 1.1 google alt-svc: h3=":443"; ma=86400 cf-cache-status: MISS set-cookie: __cf_bm=dsDqI6m4Zzc__vcL5JhrCi5KMjVFnXgyLjMIqn5QaRU-1760456365-1.0.1.1-8lvaAMvy8c_rLH0EKBOz.iDVqQkdUiXaN_nBDZi2aAufbUBTA13knOroED_OKnv6nVuSRMsPZ5cXAIYb0sQpMcEHo7KTUO2DcTENbAAXnp8; path=/; expires=Tue, 14-Oct-25 16:09:25 GMT; domain=.educative.io; HttpOnly; Secure; SameSite=None strict-transport-security: max-age=31536000; includeSubDomains; preload server: cloudflare cf-ray: 98e82b5d4dc6a9b7-BLR Solution: Redundant Connection

Grokking the Coding Interview Patterns in Python/

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Solution: Redundant Connection

Let's solve the Redundant Connection problem using the Union Find pattern.

We'll cover the following...

Statement

We’re given an undirected graph consisting of $n$ nodes. The graph is represented as list called edges, of length $n$ , 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 $n$ nodes. If there are multiple candidates for removal, return the edge that occurs last in edges.

Constraints:

$3 \leq$ $n$ $\leq 100$
edges.length $=$ $n$
edges[i].length $=$

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