2018年3月1日
[LeetCode] 144. Binary Tree Preorder Traversal 二叉树的先序遍历
摘要： Given a binary tree, return the preorder traversal of its nodes' values. For example:Given binary tree {1,#,2,3}, return [1,2,3]. Note: Recursive solu 阅读全文
posted @ 2018-03-01 07:27 轻风舞动 阅读(425) 评论(0) 推荐(0) 编辑
[LeetCode] 94. Binary Tree Inorder Traversal 二叉树的中序遍历
摘要： Given a binary tree, return the inorder traversal of its nodes' values. For example:Given binary tree {1,#,2,3}, return [1,3,2]. Note: Recursive solut 阅读全文
posted @ 2018-03-01 06:24 轻风舞动 阅读(1218) 评论(0) 推荐(0) 编辑
2018年2月28日
[LeetCode] 91. Decode Ways 解码方法
摘要： A message containing letters from A-Z is being encoded to numbers using the following mapping: Given a non-empty string containing only digits, determ 阅读全文
posted @ 2018-02-28 15:11 轻风舞动 阅读(548) 评论(0) 推荐(0) 编辑
[LeetCode] 441. Arranging Coins 排列硬币
摘要： You have a total of n coins that you want to form in a staircase shape, where every k-th row must have exactly k coins. Given n, find the total number 阅读全文
posted @ 2018-02-28 12:58 轻风舞动 阅读(350) 评论(0) 推荐(0) 编辑
[LeetCode] 653. Two Sum IV - Input is a BST 两数之和之四 - 输入是二叉搜索树
摘要： Given a Binary Search Tree and a target number, return true if there exist two elements in the BST such that their sum is equal to the given target. E 阅读全文
posted @ 2018-02-28 09:41 轻风舞动 阅读(486) 评论(0) 推荐(0) 编辑
[LeetCode] 170. Two Sum III - Data structure design 两数之和之三 - 数据结构设计
摘要： Design and implement a TwoSum class. It should support the following operations:add and find. add - Add the number to an internal data structure.find 阅读全文
posted @ 2018-02-28 09:24 轻风舞动 阅读(883) 评论(0) 推荐(0) 编辑
[LeetCode] 167. Two Sum II - Input array is sorted 两数和 II - 输入是有序的数组
摘要： Given an array of integers that is already sorted in ascending order, find two numbers such that they add up to a specific target number. The function 阅读全文
posted @ 2018-02-28 09:11 轻风舞动 阅读(868) 评论(0) 推荐(0) 编辑
[LeetCode] 1. Two Sum 两数和
摘要： Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have ex 阅读全文
posted @ 2018-02-28 08:51 轻风舞动 阅读(1030) 评论(0) 推荐(0) 编辑
[LeetCode] 157. Read N Characters Given Read4 用Read4来读取N个字符
摘要： The API: int read4(char *buf) reads 4 characters at a time from a file.The return value is the actual number of characters read. For example, it retur 阅读全文
posted @ 2018-02-28 08:40 轻风舞动 阅读(1243) 评论(0) 推荐(0) 编辑
[LeetCode] 158. Read N Characters Given Read4 II - Call multiple times
摘要： The API: int read4(char *buf) reads 4 characters at a time from a file. The return value is the actual number of characters read. For example, it retu 阅读全文
posted @ 2018-02-28 08:35 轻风舞动 阅读(1963) 评论(0) 推荐(0) 编辑