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→Directed walk, trail, path 有向的步道，轨迹，路径
A weighted directed graph associates a value (weight) with every edge in the directed graph. The weight of a directed walk (or trail or path) in a weighted directed graph is the sum of the weights of the traversed edges. Sometimes the words cost or length are used instead of weight.
A weighted directed graph associates a value (weight) with every edge in the directed graph. The weight of a directed walk (or trail or path) in a weighted directed graph is the sum of the weights of the traversed edges. Sometimes the words cost or length are used instead of weight.
一个加权有向图将一个值(权)与有向图中的每条边相关联。加权有向图中有向步道(或路径)的权是有向边权重的和。有时，“成本”或“长度”这两个词可以用来代替“权重”。
一个加权有向图将一个值(权)与有向图中的每条边相关联。加权有向图中有向步道(或路径)的权是有向边权重的和。有时，“成本”或“长度”这两个词可以用来代替“权重”这一概念。
== Examples 例子==
== Examples 例子==