摘要：1064 Complete Binary Search Tree （30 分）A Binary Search Tree (BST) is recursively defined as a binary tree which has the following prop... 阅读全文

摘要：1057 Stack （30 分）Stack is one of the most fundamental data structures, which is based on the principle of Last In First Out (LIFO). Th... 阅读全文

摘要：1045 Favorite Color Stripe （30 分）Eva is trying to make her own color stripe out of a given one. She would like to keep only her favori... 阅读全文

摘要：1034 Head of a Gang （30 分）One way that the police finds the head of a gang is to check people's phone calls. If there is a phone call... 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... 阅读全文