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In computer science, the augmented map is … In computer science, the augmented map is an abstract data type (ADT) based on ordered maps, which associates each ordered map an augmented value. For an ordered map with key type , comparison function on and value type , the augmented value is defined based on two functions: a base function and a combine function , where is the type of the augmented value. The base function converts a single entry in to an augmented value, and the combine function combines multiple augmented values. The combine function is required to be associative and have an identity (i.e., forms a monoid). We extend the definition of the associative function as follows: Then the augmented value of an ordered map is defined as follows: Accordingly, an augmented map can be formally defined as a seven-tuple . For example, an augmented map with integral keys and values, on which the augmented value is defined as the sum of all values in the map, is defined as: As an abstract data type, the augmented map is often used to model problems and serves as an abstraction with a useful interface. It is designed for supporting fast range sums, which means to quickly return the augmented value of all entries in a certain key range.lue of all entries in a certain key range.
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In computer science, the augmented map is … In computer science, the augmented map is an abstract data type (ADT) based on ordered maps, which associates each ordered map an augmented value. For an ordered map with key type , comparison function on and value type , the augmented value is defined based on two functions: a base function and a combine function , where is the type of the augmented value. The base function converts a single entry in to an augmented value, and the combine function combines multiple augmented values. The combine function is required to be associative and have an identity (i.e., forms a monoid). We extend the definition of the associative function as follows:on of the associative function as follows:
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Augmented map
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