Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Design an algorithm to find all pairs of integers within an array which sum to a specified value (assume for simplicity that the array has distinct elements). For example, for the array A[2 5 3 6 4] and sum = 8, it prints (2,6) and (3,5). Provide a brute-force solution. What is the worst-case running time of this solution and why using only informal justification. Then try to find a better solution, and show how its worst-case running time is better. 

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