摘要： I mean your borrowers of books - those mutilators of collections, spoilers of the symmetry of shelves, and creators of odd volumes. - (Charles Lamb, E 阅读全文

摘要： The only printer in the computer science students' union is experiencing an extremely heavy workload. Sometimes there are a hundred jobs in the printe 阅读全文

摘要： We call a figure made of points is left-right symmetric as it is possible to fold the sheet of paper along a vertical line and to cut the figure into 阅读全文

摘要： You are to find all the two-word compound words in a dictionary. A two-word compound word is a word in the dictionary that is the concatenation of exa 阅读全文