当各边上的权值满足什么要求时 宽度优先搜索算法可用来解决单源最短路径问题? What requirement
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当各边上的权值满足什么要求时,宽度优先搜索算法可用来解决单源最短路径问题? What requirement do the weight of edges should satisfied to make width-first search algorithm can solve single source shortest path problem?
A.均互不相等 Each edge is not equal to each other.
B.均相等Equal
C.不一定相等 No limitation.
D.不一定相等(忽略该选项)

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均相等Equal
