摘要：Given an array A of integers, for each integer A[i] we need to choose either x = K or x = K, and add x to A[i] (only once). After this process, we hav 阅读全文

摘要：Given an array A of integers, for each integer A[i] we may choose any x with K & A, int K) { int a = INT_MAX; int b = INT_MIN; for (int i = 0; i 阅读全文

摘要：Write an iterator that iterates through a run length encoded sequence. The iterator is initialized by RLEIterator(int[] A), where A is a run length en 阅读全文

摘要：Write a class StockSpanner which collects daily price quotes for some stock, and returns the span of that stock's price for the current day. The span 阅读全文

摘要：Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). bfs层序遍历整颗树。 阅读全文

摘要：Given two words word1 and word2, find the minimum number of operations required to convert word1 to word2. You have the following 3 operations permitt 阅读全文

摘要：Suppose you have a random list of people standing in a queue. Each person is described by a pair of integers (h, k), where h is the height of the pers 阅读全文