原题链接在这里:https://leetcode.com/problems/valid-palindrome-iii/ 题目: Given a stringsand an integerk, find out if the given string is aK-Palindromeor not. A string is K-Palindrome if it can be transformed into a palindrome by removing at mostkcharacters from it. Example 1: Input: ...
Memory Usage: 21.3 MB 1classSolution {2func isValidPalindrome(_ s: String, _ k: Int) ->Bool {3let n:Int =s.count4vars:[Character] =Array(s)5vardp:[Int] = [Int](repeating:1, count: n)6foriin0..<n7{8varlast:Int =09forjinstride(from: i -1, through:0, by: -1)10{11v...
Valid Palindrome·有效回文 秦她的菜 吉利 程序员 题目描述 英文版描述 A phrase is a palindrome if, after converting all uppercase letters into lowercase letters and removing all non-alphanumeric characters, it reads the same forward and backward. Alphanumeric characters include letters and ...
Leetcode 694 Number of Distinct Islands Leetcode 131 Palindrome Partitioning 基于排列组合的DFS: 其实与图类DFS方法一致,但是排列组合的特征更明显 Leetcode 17 Letter Combinations of a Phone Number Leetcode 39 Combination Sum(I, II, III相似, IV为动态规划题目) Leetcode 78 Subsets (I, II 重点在于如...
[Leetcode][python]Valid Palindrome/验证回文串 题目大意 判断一个字符串是否是回文字符串,只考虑字母和数字,并且忽略大小写。 注意点: 空字符串在这里也定义为回文串 解题思路 去掉除了数字和字母之外的字符isalnum() 都改为小写 将数组(字符串)反过来,判断是否相等...
LeetCode216. 组合总和 III ☕ 题目:77. 组合 (https://leetcode-cn.com/problems/combinations/) ❓ 难度:中等 📕 描述: 找出所有相加之和为n的 k 个数的组合。组合中只允许含有 1 - 9 的正整数,并且每种组合中不存在重复的数字。 说明: ...
1216.Valid-Palindrome-III (M+) 1312.Minimum-Insertion-Steps-to-Make-a-String-Palindrome (M+) 1458.Max-Dot-Product-of-Two-Subsequences (M) 1771.Maximize-Palindrome-Length-From-Subsequences (H) 状态压缩DP 465.Optimal-Account-Balancing (H) 691.Stickers-to-Spell-Word (H) 1125.Smallest-Suffici...
76 reverse-words-in-a-string-iii 📗 Easy LeetCode String 77 reverse-vowels-of-a-string 📗 Easy LeetCode String 78 ugly-number 📗 Easy LeetCode Math 79 valid-anagram 📗 Easy LeetCode HashTable 80 valid-palindrome-ii 📗 Easy LeetCode String 81 word-pattern 📗 Easy LeetCode Hash...
260 Single Number III 40.7% Medium 258 Add Digits 47.6% Easy 257 Binary Tree Paths 24.9% Easy 242 Valid Anagram 39.1% Easy 241 Different Ways to Add Parentheses 30.6% Medium 240 Search a 2D Matrix II 31.4% Medium 239 Sliding Window Maximum 24.8% Hard 238 Product of Array Except Self 39.5...
1216 Valid Palindrome III 49.4% Hard 1217 Minimum Cost to Move Chips to The Same Position Go 71.3% Easy 1218 Longest Arithmetic Subsequence of Given Difference 46.4% Medium 1219 Path with Maximum Gold 65.5% Medium 1220 Count Vowels Permutation 54.1% Hard 1221 Split a String in Balanced...