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摘要： 题目： There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a car with an unlimited gas tank and it 阅读全文

摘要： 题目： Given a 2D board containing 'X' and 'O', capture all regions surrounded by 'X'. A region is captured by flipping all 'O's into 'X's in that surrou 阅读全文

摘要： 题目： Given a binary tree containing digits from 0-9 only, each root-to-leaf path could represent a number. An example is the root-to-leaf path 1->2->3  阅读全文

摘要： 题目： Given two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence from beginWord to endWo 阅读全文

摘要： 题目： Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row below. For example, given th 阅读全文

摘要： 题目： Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. 链接： http://leetcode.com/problems/con 阅读全文

摘要： 题目： Given inorder and postorder traversal of a tree, construct the binary tree. Note:You may assume that duplicates do not exist in the tree. 链接： http 阅读全文

摘要： 题目： Given preorder and inorder traversal of a tree, construct the binary tree. Note:You may assume that duplicates do not exist in the tree. 链接： http: 阅读全文

摘要： 题目： Given a binary tree, return the zigzag level order traversal of its nodes' values. (ie, from left to right, then right to left for the next level 阅读全文