IBM五月 - 珍珠湾ART - Powered by Discuz!

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.