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Graph Planarity

A challenge by mousetail avatar mousetail

Description

A graph is planar if it’s possible to draw onto a plane with no intersecting edges.

I explained some context for the algorithm here: github.com/mousetail/graphs/blob/…/README.md

Input is given as a comma separated list of edges fore each vertex. Output only the graphs that are planar. Each graph is fully connected and has up to 100 total vertices.

Leaderboard

Author Score
#1 ovs-code avatar ovs-code 375
#2 mousetail avatar mousetail 566
#3 AlephSquirrel avatar AlephSquirrel 839
Challenge ends in 26 January 2026
JavaScript (Deno) Kotlin JavaScript (NodeJS) Python Rust C (tcc) APL (TinyAPL) Vyxal Vyxal 3
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