注意:a + b 意味着字符串 a 和 b 连接。 来源:力扣(LeetCode) 链接:https://leetcode.cn/problems/interleaving-string 著作权归领扣网络所有。商业转载请联系官方授权,非商业转载请注明出处。 题意是给 s1, s2 和 s3,验证 s3 是否是由 s1 和 s2 交错组成的。这是典型的二维 DP 题,设 dp[i][j] ...
原题链接在这里:https://leetcode.com/problems/first-unique-character-in-a-string/ 题目: Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1. Examples: s="leetcode" return0. s="loveleetcode", return2. 题解: 扫两遍str...
Can you solve this real interview question? Increasing Decreasing String - You are given a string s. Reorder the string using the following algorithm: 1. Remove the smallest character from s and append it to the result. 2. Remove the smallest characte
Can you solve this real interview question? String Compression - Given an array of characters chars, compress it using the following algorithm: Begin with an empty string s. For each group of consecutive repeating characters in chars: * If the group's
链接:https://leetcode.cn/problems/lexicographically-smallest-equivalent-string 著作权归领扣网络所有。商业转载请联系官方授权,非商业转载请注明出处。 思路是并查集。 这道题给的是两个字符串 s1 和 s2,两者等长,而且两者对应 index 上的字母是等价的。这里的等价意味着两个字母是可以互相替换的。题目同时又给了...
原题链接在这里:https://leetcode.com/problems/number-of-segments-in-a-string/ 题目: Count the number of segments in a string, where a segment is defined to be a contiguous sequence of non-space characters. Please note that the string does not contain any non-printable characters. ...
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原题链接在这里:https://leetcode.com/problems/unique-substrings-in-wraparound-string/description/ 题目: Consider the stringsto be the infinite wraparound string of "abcdefghijklmnopqrstuvwxyz", soswill look like this: "...zabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcd...". Now...
How to Compress strings in-place using Run-length Encoding? Edges cases have to be considered carefully when the input strings are length zero or length one. In both cases, no modifications take place and we should immediately return the length of the strings. ...
Leetcode之Reverse Vowels of a String 问题 问题描述: Write a function that takes a string as input and reverse only the vowels of a string. Note: The vowels does not include the letter "y". 示例一: Given s = "hello", return "... ...