A spider, S, sits in one corner of a cuboid room, measuring 6 by 5 by 3, and a fly, F, sits in the opposite corner. By travelling on the surfaces of the room the shortest "straight line" distance from S to F is 10 and the path is shown on the diagram.A spider, S, sits in one corner of a cuboid
阅读背景：
Project Euler：Problem 86 Cuboid route
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