摘要： 题目： All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is sometimes useful 阅读全文

摘要： 题目： Given an input string, reverse the string word by word. A word is defined as a sequence of non-space characters. The input string does not contain 阅读全文

摘要： 题目： Given a list of non negative integers, arrange them such that they form the largest number. For example, given [3, 30, 34, 5, 9], the largest form 阅读全文

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

摘要： 题目： Given two integers representing the numerator and denominator of a fraction, return the fraction in string format. If the fractional part is repea 阅读全文

摘要： 题目： Compare two version numbers version1 and version2.If version1 > version2 return 1, if version1 < version2 return -1, otherwise return 0. You may a 阅读全文

摘要： 题目： Given a sorted integer array where the range of elements are [lower, upper] inclusive, return its missing ranges. For example, given [0, 1, 3, 50, 阅读全文

摘要： 题目： A peak element is an element that is greater than its neighbors. Given an input array where num[i] ≠ num[i+1], find a peak element and return its 阅读全文

摘要： 题目： Given two strings S and T, determine if they are both one edit distance apart. 链接： http://leetcode.com/problems/one-edit-distance/ 6/14/2017 2ms, 阅读全文

摘要： 题目： Given a binary tree where all the right nodes are either leaf nodes with a sibling (a left node that shares the same parent node) or empty, flip i 阅读全文