Prefix Sum Array and Range Sum Queries
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Prefix Sum Array and Range Sum Queries
Prefix Sum Arrays or simply Prefix Sums are used to perform fast range sum queries on a given array. The total time complexity of the algorithm is O(N + Q) where N is the number of elements in the given array and Q is the number of range sum queries. Each of the Q queries are answered in O(1) time. This topic often appears during technical ...
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