摘要：If you need to maintain a list of objects that are sorted and unique & if you need to be able to quickly insert and retrieve objects to and from this 阅读全文

摘要：http://www.geeksforgeeks.org/rearrange-a-string-so-that-all-same-characters-become-at-least-d-distance-away/ Given a string and a positive integer d. 阅读全文

摘要：http://pages.cs.wisc.edu/~skrentny/cs367-common/readings/Red-Black-Trees/http://en.wikipedia.org/wiki/Red–black_tree1.Every node is either red or blac... 阅读全文