题目:给定一个字符串S(主串),一个字符串数组words,其中的字符串的长度相同.找到所有的子串位置,要求是words中字符串的一个连接: 举例: For example, given:s: "barfoothefoobarman"words: ["foo", "bar"] You should return the indices: [0,9]. 解题思路: 1. 采用窗口机制,假设此时每个单词的长度为wordlen; 2. 先将words
Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority element always exist in the array. 这里题目要求找出出现次数超过n/2的元素. 可以先排序,
偶然在群里看到有人问到大数据查询,自己也就想了小艾改如何解决,从从1000万个随机数中查找出相同的10万个随机数花的最少时间, 谈到效率,自然是hashmap莫属. import java.util.HashMap;import java.util.Map;import java.util.Random; public class dataTest { private static final int [] datas = new int [1000 * 10000]; //1000万个随机数
很多时候,从一个关系表中挑出一个我们需要的元素列表采用SQL语句是再容易不过的了,其实C#的List中也可以采用类似的方法,虽然List中集成了Select(), Where()等语句,不过如果你的判断规则较为复杂,或者想要看起来一目了然,以下的方法也是可行的: 首先假设你有一个类 public class People { public string Name { get; set; } public int Age { get; set; } } 并且有一些初始化语句 List<People
find the longest of the shortest Time Limit: 1000/5000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2524 Accepted Submission(s): 888 Problem Description Marica is very angry with Mirko because he found a new gi