Engineering, 15.04.2020 17:27 cia196785920
Let A[1..n] be an array of distinct positive integers, and let t be a positive integer.(a) Assuming that A is sorted, show that in O(n) time it can be decided if A contains two distinct elements x and y such that x + y = t.
(b) Use part (a) to show that the following problem, referred to as the 3-Sum problem, can be solved in O(n2) time: 3-Sum Given an array A[1..n] of distinct positive integers that is not (necessarily) sorted, and a positive integer t, de- termine whether or not there are three distinct elements x, y, z in A such that x + y + z = t.
Answers: 3
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Let A[1..n] be an array of distinct positive integers, and let t be a positive integer.(a) Assuming...
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