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" return 0. s = "loveleetcode", return 2. Note:You may assume the string contain only lowercase letters. 题目分析: 题目总体来说还是比较easy,...
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" return 0. s = "loveleetcode", return 2. Note: You may assume the string contain only lowercase letters. 要完成的函数: int firstUniqChar(...
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...
leetcode 387. First Unique Character in a String 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" return 0. s = "loveleetcode", return 2. 1. 2. 3. 4. 5. Note:You may assume the ...
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" return 0. s = "loveleetcode", return 2. 1. 2. 3. 4. 5. 题意:给定一个字符串,返回字符串中第一个在字符串中只出现过一次的字符的下...
LeetCode 387: 字符串中的第一个唯一字符 First Unique Character in a String 题目: 给定一个字符串,找到它的第一个不重复的字符,并返回它的索引。如果不存在,则返回 -1。 Given a string, find the first non-repeating character in it and return it’s index. If it doesn’t exist, return -1....
每次计算重复字母长度时,当出现更长的可能时,都更新最终的结果。 code 代码语言:javascript 代码运行次数:0 funccharacterReplacement(s string,k int)int{iflen(s)==0{return0}str:=[]byte(s)start,end:=0,0ret:=0c:=make([]int,26)c[str[0]-'A']++forlen(str)>end{maxc:=0fori:=0;i<26;...
题目描述: LeetCode 424. Longest Repeating Character Replacement Given a string that consists of only uppercase English letters, you can replace any letter in the string with another letter at most k times. Find the length of a longest substring containi
像这道题就是总是考虑窗口左侧的 char 为 repeating char。 代码语言:javascript 代码运行次数:0 运行 复制 class Solution { public int characterReplacement(String s, int k) { if (s==null || k<0) throw new IllegalArgumentException(); if (s.length()==0) return 0; int left=0, right=0;...
Longest Repeating Character Replacement Leetcode 76. Minimum Window Substring Leetcode 3. Longest Substring Without Repeating Characters Leetcode 1004 Max Consecutive Ones III Leetcode 1658 Minimum Operations to Reduce X to Zero 宽度优先搜索(BFS):面试中最常考的 基础知识: 常见的BFS用来解决什么问题?