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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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Mul + div using only add/sub ?

Division is repeated subtraction. Take 11 \div 3 as an example. 11 - 3 = 8. Increment the quotient by 1. Since 8 > 3, keep going. 8 - 3 = 5. Increment the quotient by 1. Since 5 > 3, keep going. 5 …
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