There are n ill-behaved children named 1, 2, · · · , n. You are given a bunch of statements of the form "i throws rocks at j". Your goal is to arrange the kids into rows such that if i throws rocks at j then i must be in a lower numbered row than j. Give an algorithm to find the minimum number of rows needed, if it is possible.

Which of the following statements is true of an intranet? it is a network where a computer is connected to the internet and acts as a gateway for other devices.it is a widely available public network of interconnected computer networks.it is a network that covers a wide area with the of rented telecommunication lines.it is a network within an organization that uses internet protocols and technologies.