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Problem 3. You are stuck in some city s in a far far away land and you know that your only way out is t reach another city t. This land consists of a collection of c cities and p ports (both s andt are cities). TH cities in the land are connected by one-way roads to other cities and ports ad you can travel these roac as many times as you like. In addition, there are one-way shipping routes between certain ports. Howeve unlike the roads, you need a ticket to use these shipping routes and you only have 10 tickets; so effectivel you can use at most 10 shipping routes in your journey. Assume the map of this land is given to you as a graph with n = c+p vertices corresponding to the citie and ports and m directed edges showing one-way roads and shipping routes. Design an algorithm that i O(n + m) time outputs whether or not it is possible for you to go from city s to city t in this land followin the rules above, i.e., by using any number of roads but at most 10 shipping routes. Example: An example of an input map (on the left) and a possible solution (on the right) is the following

Problem 3. You are stuck in some city s in a far far away land and you know that your only way out is t reach another city t. This land consists of a collection of c cities and p ports (both s andt are cities). TH cities in the land are connected by one-way roads to other cities and ports ad you can travel these roac as many times as you like. In addition, there are one-way shipping routes between certain ports. Howeve unlike the roads, you need a ticket to use these shipping routes and you only have 10 tickets; so effectivel you can use at most 10 shipping routes in your journey. Assume the map of this land is given to you as a graph with n = c+p vertices corresponding to the citie and ports and m directed edges showing one-way roads and shipping routes. Design an algorithm that i O(n + m) time outputs whether or not it is possible for you to go from city s to city t in this land followin the rules above, i.e., by using any number of roads but at most 10 shipping routes. Example: An example of an input map (on the left) and a possible solution (on the right) is the following

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Problem 3. You are stuck in some city s in a far far away land and you know that your only way out is to reach another city t. This land consists of a collection of c cities and p ports (both s andt are cities). The cities in the land are connected by one-way roads to other cities and ports and you can travel these roads as many times as you like. In addition, there are one-way shipping routes between certain ports. However, unlike the roads, you need a ticket to use these shipping routes and you only have 10 tickets; so effectively you can use at most 10 shipping routes in your journey. Assume the map of this land is given to you as a graph with n = c+p vertices corresponding to the cities and ports and m directed edges showing one-way roads and shipping routes. Design an algorithm that in O(n + m) time outputs whether or not it is possible for you to go from city s to city t in this land following the rules above, i.e., by using any number of roads but at most 10 shipping routes. Example: An example of an input map (on the left) and a possible solution (on the right) is the following:
Transcribed Image Text:Problem 3. You are stuck in some city s in a far far away land and you know that your only way out is to reach another city t. This land consists of a collection of c cities and p ports (both s andt are cities). The cities in the land are connected by one-way roads to other cities and ports and you can travel these roads as many times as you like. In addition, there are one-way shipping routes between certain ports. However, unlike the roads, you need a ticket to use these shipping routes and you only have 10 tickets; so effectively you can use at most 10 shipping routes in your journey. Assume the map of this land is given to you as a graph with n = c+p vertices corresponding to the cities and ports and m directed edges showing one-way roads and shipping routes. Design an algorithm that in O(n + m) time outputs whether or not it is possible for you to go from city s to city t in this land following the rules above, i.e., by using any number of roads but at most 10 shipping routes. Example: An example of an input map (on the left) and a possible solution (on the right) is the following:
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