Create algorithm to perform any sequence of two operations

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Reference no: EM1367736

Let A[1, n] be an array of real numbers. Design an algorithm to perform any sequence of the following two operations:

Add(i, x): add the value x to A[i].
PartialSum(k): return the sum of the ?rst k numbers,

∑ A[i]

Notice that the number of elements remains ?xed (there are no insertions or deletions); the only changes are to the values. Each operation should take O(log n) time. You can use an extra work space of size n.

Reference no: EM1367736


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