摘要：
UVa 10006 - Carmichael Numbers An important topic nowadays in computer science is cryptography. Some people even think that cryptography is the only... 阅读全文
摘要：
UVa 10154 - Weights and Measures I know, up on top you are seeing great sights, But down at the bottom, we, too, should have rights. We turtl... 阅读全文