摘要：
原题: http://poj.org/problem?id=3294或者：http://acm.nankai.edu.cn/p1312.htmlDescriptionYou may have wondered why most extraterrestrial life forms resemble humans, differing by superficial traits such as height, colour, wrinkles, ears, eyebrows and the like. A few bear no human resemblance; these typical 阅读全文
