摘要： Description：Implement an iterator over a binary search tree (BST). Your iterator will be initialized with the root node of a BST.Calling next() will r... 阅读全文

摘要： Description：Given a sorted array of integers, find the starting and ending position of a given target value.Your algorithm's runtime complexity must b... 阅读全文

摘要： 超时了，只能先这么干了。return Math.pow(x, n); 阅读全文