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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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Finding $k$ active elements by evaluating the "any-operator" of subsets of variables

Assume a set $S$ of elements $\{s_1,\dots,s_n\}$, each which has a hidden label 'active' or 'inactive'. Assume there are $m\ll n$ active elements in total. You are allowed to iteratively perform a sin …