Write a function to find the longest common prefix string amongst an array of strings. 思路:要去是寻找字符串vector里最长的公有前缀. 1.构造迭代器,遍历vector搜索最小string长度.然后从第一个字符开始进行遍历,如果遇到不一样的字符即返回,全部遍历完毕没问题就把它添加到前缀字符串里. 这样做效率比较差,有待改进. class Solution { public: string longestC…
NAACL 2019 表示学习分析 为要找出字.词.文档等实体表示学习相关的文章. word embedding 搜索关键词 word embedding Vector of Locally-Aggregated Word Embeddings (VLAWE): A Novel Document-level Representation In this paper, we propose a novel representation for text documents based on agg…
摘自:http://makble.com/what-is-term-vector-in-lucene given a document, find all its terms and the positions information of these terms. Index tell us which document matched , term vector tells us how and where its matched. A classic example is search r…
Vector Space Model The vector space model provides a way of comparing a multiterm query against a document. The output is a single score that represents how well the document matches the query. In order to do this, the model represents both the docum…
Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties: Integers in each row are sorted in ascending from left to right. Integers in each column are sorted in ascending from top to bottom.…
Follow up for "Search in Rotated Sorted Array":What if duplicates are allowed? Would this affect the run-time complexity? How and why? Write a function to determine if a given target is in the array. 这道是之前那道Search in Rotated Sorted Array 在旋转有序数组…
Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties: Integers in each row are sorted from left to right. The first integer of each row is greater than the last integer of the previous ro…
Given a sorted array of integers, find the starting and ending position of a given target value. Your algorithm's runtime complexity must be in the order of O(log n). If the target is not found in the array, return [-1, -1]. For example,Given [5, 7,…
Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). You are given a target value to search. If found in the array return its index, otherwise return -1. You may assume no duplic…
A - 棋盘问题:在一个给定形状的棋盘(形状可能是不规则的)上面摆放棋子,棋子没有区别.要求摆放时任意的两个棋子不能放在棋盘中的同一行或者同一列,请编程求解对于给定形状和大小的棋盘,摆放k个棋子的所有可行的摆放方案C. 解题思路:DFS,在这里有两个搜索方向,同时对每个位置的描述由xy坐标完成,第一次我尝试使用pair+vector保存棋盘位置,用两个数组描述放过棋子的行和列但是由于清除标记没做好WA了.这里是因为DFS搜索中状态转移没确定好,导致清楚标记复杂而出错,改为逐行递归逐列遍历.在这里…
Channel Allocation Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 14601 Accepted: 7427 Description When a radio station is broadcasting over a very large area, repeaters are used to retransmit the signal so that every receiver has a s…
How many ways Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4926 Accepted Submission(s): 2917 Problem Description 这是一个简单的生存游戏,你控制一个机器人从一个棋盘的起始点(1,1)走到棋盘的终点(n,m).游戏的规则描述如下:1.机器人一开始在棋盘的起始点并有起…
