难度：好象很容易，+.5？
This month's puzzle concerns configurations of 4 distinct points in the plane. Suppose we know the 6 distances between pairs of points only take on two values. We ask for a list of the distinct possible configurations. For each configuration give the number of long distances and the number of short distances (which must sum to 6) and the ratio of the long distance to the short distance.
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哈哈哈哈 O(∩_∩)O哈哈~ 好久不来了，不小心看了一眼自己主页，发现自动关联了自己以往发过的帖，点进这个看了一眼，笑个半死。。。敢情我当初还发过这么搞笑的东西啊，我自己完全不记得了 
雷达卡
发表于 2006-5-2 17:42:11
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