Given two sentences words1, words2 (each represented as an array of strings), and a list of similar word pairs pairs, determine if two sentences are similar. For example, "great acting skills" and "fine drama talent" are similar, if th…

Given two sentences words1, words2 (each represented as an array of strings), and a list of similar word pairs pairs, determine if two sentences are similar. For example, words1 = ["great", "acting", "skills"] and words2 = [&…

1. 问题描写叙述 给定一个单链表,推断其内容是不是回文类型. 比如1–>2–>3–>2–>1.时间和空间复杂都尽量低. 2. 方法与思路 1)比較朴素的算法. 因为给定的数据结构是单链表,要訪问链表的尾部元素,必须从头開始遍历.为了方便推断.我们能够申请一个辅助栈结构来存储链表的内容,第一次遍历将链表节点值依次入栈,第二次遍历比較推断是否为回文. /** * Definition for singly-linked list. * struct ListNode { * int…

Given two sentences words1, words2 (each represented as an array of strings), and a list of similar word pairs pairs, determine if two sentences are similar. For example, words1 = ["great", "acting", "skills"] and words2 = [&…

Scramble String Given a string s1, we may represent it as a binary tree by partitioning it to two non-empty substrings recursively. Below is one possible representation of s1 = "great": great / \ gr eat / \ / \ g r e at / \ a t To scramble the s…

早就想刷LeetCode了,但一直在拖,新学期开学,开始刷算法. 我准备从Python和C++两种语言刷.一方面我想做机器学习,以后用Python会比较多,联系一下.另一方面C++或者C语言更接近底层,能够让我更深入的理解算法. 1.题目 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…

http://oj.leetcode.com/problems/search-for-a-range/ 要求复杂度为O(lgn),用二分查找的思想. #include <iostream> #include <vector> using namespace std; class Solution { public: void fun(int* A,int start,int end,int target,vector<int> &ans) { if(start&…

题目描述 给定一个整数数组 nums 和一个整数目标值 target,请你在该数组中找出 和为目标值 的那 两个 整数,并返回它们的数组下标. 你可以假设每种输入只会对应一个答案.但是,数组中同一个元素在答案里不能重复出现. 你可以按任意顺序返回答案. 示例 1: 输入:nums = [2,7,11,15], target = 9 输出:[0,1] 解释:因为 nums[0] + nums[1] == 9 ,返回 [0, 1] . 示例 2: 输入:nums = [3,2,4], target…

FAQ 1. MOOC是什么? 2. xMOOC又是什么? 它与之前在中国大陆网络上风靡一时的国外大学"公开课"有什么区别?3. xMOOC什么时候, 怎样出现的? 4. 有哪些网站提供xMOOC课程? 哪个好?5. 怎么注册课程和使用网站呢? 6. 需要付费么?7. 大陆访问会有障碍么?8. 英语不好, 视频听不懂怎么办?9. 视频和字幕可以下载嘛?10. 落下了作业和部分考试怎么办? 我想上的课已经结课了怎么办?11. 课程的深度和质量对于在校生会不会很鸡肋?12. 有其他类似在线…

Given two sentences words1, words2 (each represented as an array of strings), and a list of similar word pairs pairs, determine if two sentences are similar. For example, "great acting skills" and "fine drama talent" are similar, if th…