Joilee

摘要： One way that the police finds the head of a gang is to check people's phone calls. If there is a phone call between A and B, we say that A and B is re... 阅读全文

摘要： It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that c... 阅读全文

摘要： A traveler's map gives the distances between cities along the highways, together with the cost of each highway. Now you are supposed to write a progra... 阅读全文