CC2203-Les15Greedy-for-viewing

# CC2203-Les15Greedy-for-viewing - Lesson 15 The Greedy...

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15-1/22 Lesson 15: The Greedy Method Optimization Problem A problem in which some function (called the optimization or objective function) is to be optimized (usually minimized or maximized) subject to some constraints.

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15-2/22 Feasible And Optimal Solutions A feasible solution is a solution that satisfies the constraints. An optimal solution is a feasible solution that optimizes the objective/optimization function.
15-3/22 Greedy Method Solve problem by making a sequence of decisions. Decisions are made one by one in some order. Each decision is made using a greedy criterion. A decision, once made, is (usually) not changed later. Greedy method gives a good heuristic.

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15-4/22 Shortest Path Problems Directed weighted graph. Path length is sum of weights of edges on path. The vertex at which the path begins is the source vertex. The vertex at which the path ends is the destination vertex.
15-5/22 Example A path from 1 to 7. 1 2 3 4 5 6 7 2 6 16 7 8 10 3 14 4 4 5 3 1 Path length is 14.

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15-6/22 Example Another path from 1 to 7.
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