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This tutorial will introduce the concept of network flow, including optimizing the flow through a network. The Ford-Fulkerson algorithm will be used to accomplish this. First, let's introduce the concept of a network. It is a type of Graph, specifically a directed graph, with capacities on the flow volumes through edges. The flow originates at a vertex called the source and travels to a destination vertex known as a sink. There can be many sources and sinks, but for the sake of this tutorial, networks with only a single source and sink will be examined. Applying this to real life, pipes can carry only certain amounts of water and computer networks have transfer and bandwidth limits. So network flow optimization has a very practical application.