The problem of collecting and delivery shunting of non-through wagon flow on the actinoid private line belongs to a kind of the combinatorial optimization problems.
放射专
线非直达车流取送车问题属于一类组合优化问题,影响
素较多。
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But thinking of colors on the cube, you're naturally led to an interesting combinatorial question: Is there a way to color the cube so that the three neighbors of any given vertex will always represent red, green and blue.
是想到立方体上的颜色,您自然会想到一个有趣的组合问题:是否有一种方法可以为立方体着色,以便任何给定顶点的三个邻居始终代表红色、绿色和蓝色。