Write a function to find the longest common prefix string amongst an array of strings. 题解: 寻找一组字符串的最长公共前缀.  最简单的方法,用一个字符串记录当前最长的公共前缀,然后依次比较.时间复杂度: O(N). class Solution { public: string getPrefix(string a,string b) // 辅助函数用于获取两个字符串的公共前缀 { string ans;…

problem: Write a function to find the longest common prefix string amongst an array of strings. 寻找 0 ~n 个字符串的最长公共前缀 thinking: (1)公共前缀非常好理解.按位匹配就可以 (2)非常easy忘记处理0.1个字符串的情况. code: string prefix(string &str1, string &str2) { string tmp; int i=0; whil…

题目: 给定一系列的字符串,找出这些字符串的最长公共前缀. 解法: 暴力法,依次比较每个字符串的每个字符,碰到第一个不同的就返回之前找到的前缀. 代码: class Solution { public: string longestCommonPrefix(vector<string> &strs) { if(strs.empty()) return ""; ; i < strs[].size(); ++i) //取第一个字符串的每个字符 ; j < s…

所有字符串的公共前缀最长字符串 特点:(1)公共所有字符串前缀 (好像跟没说一样...) (2)在字典树中特点:任意从根节点触发遇见第一个分支为止的字符集合即为目标串 参考问题:https://leetcode.com/problems/longest-common-prefix/description/ Write a function to find the longest common prefix string amongst an array of strings. If there…

Write a function to find the longest common prefix string amongst an array of strings. If there is no common prefix, return an empty string "". Example 1: Input: ["flower","flow","flight"] Output: "fl" Exa…

题目简述: Write a function to find the longest common prefix string amongst an array of strings. 解题思路: class Solution: # @return a string def longestCommonPrefix(self, strs): if strs == []: return '' minl = 99999 for i in strs: if len(i) < minl: minl = l…

Write a function to find the longest common prefix string amongst an array of strings. public class Solution { public String longestCommonPrefix(String[] strs) { if (strs == null || strs.length == 0) { return ""; } else if (strs.length < 2) {…

Write a function to find the longest common prefix string amongst an array of strings. 解题思路: 老实遍历即可,注意边界条件: JAVA实现: static public String longestCommonPrefix(String[] strs) { if (strs.length == 0) return ""; for (int i = 0; i < strs[0].length(…

Write a function to find the longest common prefix string amongst an array of strings. 思路:找最长公共前缀 常规方法 string longestCommonPrefix(vector<string> &strs) { ) return ""; ) ]; string ans; ; ) { ; i < strs.size(); i++) { ].size() <= n…

小二好久没有更新博客了,真是罪过,最近在看linux的东西导致进度耽搁了,所以今晚睡觉前怒刷一题! 问题描述: Write a function to find the longest common prefix string amongst an array of strings. 解题思路: 该问题就是找到所有数组字符串里面的最长相同前字串.所以我的思路是先找到数组中最短的那个字符串,然后每次比较的时候最多循环该长度就行,这样避免字符串下标溢出的问题.设置StringBuilder对象用于存…

题目:Write a function to find the longest common prefix string amongst an array of strings. 很简单的一个描述,最长公共前缀,首先想到的是用递归,既然是找公共前缀,那肯定要两个进行比较,所以把第一个和除了第一个之外的字符串数组看作两个进行比较,再对后面的进行递归就好了,上代码. public static String longestCommonPrefix(String[] strs) { if (strs.…

题目: Write a function to find the longest common prefix string amongst an array of strings. 思路: 题意:找出字符串的最大的公共前缀 思路是写一个比较的函数,遍历 - 代码: public class Solution { public String longestCommonPrefix(String[] strs) { String result = null; if(strs == null){ re…

Write a function to find the longest common prefix string amongst an array of strings. If there is no common prefix, return an empty string "". Example 1: Input: ["flower","flow","flight"] Output: "fl" Exa…

Write a function to find the longest common prefix string amongst an array of strings. 解法: 广度优先搜索:先比较所有字符串的第一个字符,然后比较第二个....如果某一行没有了(说明其为最短的单词)或者遇到不匹配字符,则返回当前匹配到的最长前缀. public class Solution { public String longestCommonPrefix(String[] strs) { if (str…

Longest Common Prefix Write a function to find the longest common prefix string amongst an array of strings. 题目的意图 It seems that it is not to check between pair of strings but on all the strings in the array. For example: {"a","a",&quo…

Write a function to find the longest common prefix string amongst an array of strings. If there is no common prefix, return an empty string "". Example 1: Input: ["flower","flow","flight"] Output: "fl" Exa…

题目: Write a function to find the longest common prefix string amongst an array of strings. 题意: 写出一个函数.找到一组数组中的最长公共子串. 算法分析: 须要构建两重循环.第一层是最短子串的长度,还有一层是遍历字符串数组中的每一个成员. brute force的想法,以第一个字符串为标准.对于每一个字符串从第一个字符開始,看看是不是和标准一致,假设不同,则跳出循环返回当前结果.否则继续下一个字符. AC…

Question: Longest Common Prefix Write a function to find the longest common prefix string amongst an array of strings. If there is no common prefix, return an empty string "". Example 1: Input: ["flower","flow","flight&q…

14. Longest Common Prefix Easy Write a function to find the longest common prefix string amongst an array of strings. If there is no common prefix, return an empty string "". Example 1: Input: ["flower","flow","flight&qu…

一.题目链接:https://leetcode.com/problems/longest-common-prefix/ 二.题目大意: 给定若干个字符串,找出它们的最长公共子串. 三.题解: 这道题目应该是一道典型题目,需要着重掌握的.该题目的解法并不是很难,代码最好精简化.本题有两种思路: 1.纵向扫描 任意选出一个字符串(一般都是选择第一个字符串),从该字符串的第一个字符起,与剩余所有的字符串的相应位置的字符比较,若出现相应位置字符不同的情况,则立即返回之前匹配成功的前缀. 代码如下: cl…

题目链接:https://leetcode.com/problems/longest-common-prefix/?tab=Description   Problem: 找出给定的string数组中最长公共前缀   由于是找前缀,因此调用indexOf函数应当返回0(如果该字符子串为字符串的前缀时),如果不是则返回-1 Return: the index of the first occurrence of the specified substring, or -1 if there is n…

这道题是LeetCode里的第14道题. 题目描述: 编写一个函数来查找字符串数组中的最长公共前缀. 如果不存在公共前缀,返回空字符串 "". 示例 1: 输入: ["flower","flow","flight"] 输出: "fl" 示例 2: 输入: ["dog","racecar","car"] 输出: "" 解释: 输入…

最长公共前缀问题,考虑没有或只有一个字符串的情况,然后只需要逐个比对就可以了. class Solution { public: string longestCommonPrefix(vector<string>& strs) { ) return string(); ) ]; string a; ;i<strs[].size();i++){ ;j<strs.size();j++){ ][i]!=strs[j][i]) return a; } a+=strs[][i]; }…

这题实现起来还是挺麻烦的,就偷懒使用下库函数strtod().第二个参数表示字符中不是数字的地方,如果后面是空格,则认为其仍是数字,否则不是. bool isNumber(char *s) { char *endptr; strtod(s, &endptr); if (endptr == s)return false; for (; endptr; endptr++) { if (!isspace(*endptr)) return false; } return true; }…

在一组字符串中找到最长的子串.采用纵向匹配,遇到第一个不匹配的停止. string longestComPrefix(vector<string> &strs) { if (strs.empty())return " "; //纵向比较 ; idx < strs[].size(); idx++) { ; i < strs.size(); i++) { ][idx] != strs[i][idx])].substr(, idx); } } ]; }…

public class Solution { public String longestCommonPrefix(String[] strs) { if(strs == null || strs.length == 0) return ""; String pre = strs[0]; int i = 1; while(i < strs.length){ while(strs[i].indexOf(pre) != 0) pre = pre.substring(0,pre.len…

func longestCommonPrefix(strs []string) string { { return "" } { ] } ; ; idx++ { ; i < len(strs)-; i++ { ]) { ][ : idx-] } :idx] != strs[i+][:idx] { ][ : idx-] } } } }…

https://leetcode.com/problems/longest-common-prefix/ 原题: Write a function to find the longest common prefix string amongst an array of strings. 思路: 简单,直接遍历查找即可. AC代码: class Solution { public: string longestCommonPrefix(vector<string>& strs) { in…

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作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 个人公众号:负雪明烛 本文关键词:prefix, 公共前缀,题解,leetcode, 力扣,Python, C++, Java 目录 题目描述 题目大意 解题方法 遍历前缀子串 使用set 遍历最短字符串 排序 日期 题目地址:https://leetcode.com/problems/longest-common-prefix/description/ 题目描述 Write a fun…