CNoodle

摘要： Design a data structure that supports all following operations in average O(1) time. insert(val): Inserts an item val to the set if not already presen 阅读全文

摘要： On a 2x3 board, there are 5 tiles represented by the integers 1 through 5, and an empty square represented by 0. A move consists of choosing 0 and a 4 阅读全文