Google KickStart 19 round A 题目解析 － 小专栏



Google KickStart 19 round A 题目解析 － 小专栏

首先对于每一个没有 deliver 的位置，我们可以先求出它的最短距离。这个可以将整个地图看成一个 graph，然后，任意两个deliver之间的距离为 0，然后将 所有deliver 看做图上的一个节点，其他的点与点之间的距离为 曼哈顿距离，那么只需要对图做一个 bfs 就行了，这就是answer中说的 muti-source bfs，其实感觉与bfs 并没有什么区别。


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