王清河

摘要： Given a list of N student records with name, ID and grade. You are supposed to sort the records with respect to the grade in non-increasing order, and 阅读全文

摘要： The ranklist of PAT is generated from the status list, which shows the scores of the submittions. This time you are supposed to generate the ranklist 阅读全文

摘要： Forbes magazine publishes every year its list of billionaires based on the annual ranking of the world's wealthiest people. Now you are supposed to si 阅读全文

摘要： Excel can sort records according to any column. Now you are supposed to imitate this function. Input Each input file contains one test case. For each 阅读全文

摘要： A long-distance telephone company charges its customers by the following rules: Making a long-distance call costs a certain amount per minute, dependi 阅读全文

摘要： There is a public bike service in Hangzhou City which provides great convenience to the tourists from all over the world. One may rent a bike at any s 阅读全文

摘要： Weibo is known as the Chinese version of Twitter. One user on Weibo may have many followers, and may follow many other users as well. Hence a social n 阅读全文

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： A graph which is connected and acyclic can be considered a tree. The height of the tree depends on the selected root. Now you are supposed to find the 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