摘要：Given a non-empty array of numbers, a0, a1, a2, … , an-1, where 0 ≤ ai < 231. Find the maximum result of ai XOR aj, where 0 ≤ i, j < n. Could you do t 阅读全文

摘要：Implement a trie with insert, search, and startsWith methods. 题目含义：实现字典树的insert, search, 和startsWith 方法 字典树概念参考http://blog.csdn.net/u012501459/article 阅读全文

摘要：In English, we have a concept called root, which can be followed by some other words to form another longer word - let's call this word successor. For 阅读全文

摘要：Implement a magic directory with buildDict, and search methods. For the method buildDict, you'll be given a list of non-repetitive words to build a di 阅读全文