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Informally, an algorithm is a set of explicit instructions used to solve a problem (e.g. Euclid's algorithm for computing the greatest common divisor of two integers). For more specific questions on algorithms, this tag may be used in conjunction with the approximation-algorithms, algorithmic-randomness and algorithmic-topology tags.

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2 answers
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Point in Polygon algorithm from the viewpoint of a robot

I've come across the following puzzle: You're on an island, on which there is a fence (which is a simple closed contour). You need to determine whether you're inside or outside the fence. …
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