摘要：
DescriptionLittle Johnny has got a new car. He decided to drive around the town to visit his friends. Johnny wanted to visit all his friends, but there was many of them. In each street he had one friend. He started thinking how to make his trip as short as possible. Very soon he realized that the be 阅读全文
摘要：
DescriptionA catenym is a pair of words separated by a period such that the last letter of the first word is the same as the last letter of the second. For example, the following are catenyms:dog.gopher gopher.rat rat.tiger aloha.aloha arachnid.dogA compound catenym is a sequence of three or more wo 阅读全文