Longest Common Substring 最长公共子字符串 动态规划问题 动态规划问题的两个特点: 1.最优子结构 2.重叠子问题 因为有重叠子问题,当前计算的过程中可能有的问题在之前的计算已经计算过了,现在又要计算一遍,导致大量重复的计算。 动态规划通过找到解决问题的递推关系,将已经完成计算的存储起来, 当开始新的计算时如果...
可以看到substring并不是回文,这是因为s中存在子串s1和s2,而reverse(s1)=s2,但是s1本身并不是回文。 对这种情况,可以对比Index,检测反转后的substring是不是由反转前的substring得来。 至于查找s1和s2的最长公共子串,更优秀的方法可以参见:https://en.wikipedia.org/wiki/Longest_common_substring_problem 思路2: ...
7Manacher算法 这是LeetCode官网上的一种复杂度只到 O(n)的解法,可以说是屌炸天了,膜拜中... ... 如果你感兴趣的话可以了解一下,地址在这里:https://articles.leetcode.com/longest-palindromic-substring-part-ii/ 题外话:由于本人最近工作比较忙,所以刷题数量可能会稍微降低一点,但是会保证一周最少3-4题,...
LeetCode—5. Longest Palindromic Substring 题目https://leetcode.com/problems/longest-palindromic-substring/description/ 寻找最长回文子串。 思路及解法 在字符串中首先选择一个点,从这个点开始向两边扩展开去,不断比较两端的字符是不是相等。需要注意的是,回文子串的长度可奇可 Longest Palindromic Substring 题目...
1143. 最长公共子序列 Longest Common Subsequence 题目https://leetcode-cn.com/problems/longest-common-subsequence/ 看题解的...Longest Common Subsequence(C++最长公共子序列) 解题思路: (1)动态规划 ...最长公共子串(Longest Common Substring)和最长公共子序列(Longest Common Subsequence) 最长公共子串(...
LeetCode 1143. Longest Common Subsequence classic DP problem, LCS Given two strings text1 and text2, return the length of their longest common subsequence. 虽然不记得如何写的了 但是知道是DP 也知道应该用2D dp去记录 dp[i][j] represents for the LCS if text1 has a lengt......
14. Longest Common Prefix C++ 采用纵向遍历,即对第一个字符串,取出第一个字符,检查是否出现在随后每一个字符串中,以此类推。当遍历完成或有一个字符串不符合要求,直接return。 ... leetCode第十四题,最长公共前缀(Longest Common Prefix),JavaScript实现 ...
http://acm.hdu.edu.cn/showproblem.php?pid=1403 Longest Common Substring Time Limit: 8000/4000 MS (Ja ... leetcode【14题】Longest Common Prefix 题目:Longest Common Prefix 内容: Write a function to find the longest common prefix string amongst an ar ... Leetcode 14——Longest Common Pre...
Next, I'll show you how doulbe pointers work in a real leetcode problem. string longestPalindrome(string s) {} 1. Thinking Given a string s, find the longest palindromic substring in s. A very interesting pespective: 1. Reversing s in to s' 2. Finding the longest common substring. ...
https://leetcode.com/problems/longest-substring-without-repeating-characters/ Given a string, find the length of thelongest substringwithout repeating characters. Example 1: Input: "abcabcbb" Output: 3 Explanation: The answer is "abc", with the length of 3. ...