Another solution for Listing 5.9 to find thegreatest common divisor of two integers n1 and n2 is as follows: First find d to bethe minimum of n1 and n2, then check whether d, d–1, d–2, …, 2, or 1 is a divisorfor both n1 and n2 in this order. The first such common divisor is the greatestcommon divisor for n1 and n2. Write a program that prompts the user to enter twopositive integers and displays the gcd.

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Topological Sort

Topological sort is a sorting technique that sets up a hierarchy in a process. In this technique, when a directed network has nodes connected by arrows, the root node is placed before the successor node.