387 First Unique Character in a String 字符串中的第一个唯一字符 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。 案例: s = "leetcode" 返回 0. s = "loveleetcode", 返回 2. 注意事项:您可以假定该字符串只包含小写字母。 详见:https://leetcode.com/...
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. 给一个字符串,找出第一个不重复的...
Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1. 案例: Copys = "leetcode" 返回0. s = "loveleetcode", 返回 2. 注意事项:您可以假定该字符串只包含小写字母。 Note: You may assume the string contain only lowercase ...
First Unique Character in a String 题干 给定一个字符串,找到第一个非重复字符并输出 思路 两次循环, 第一次循环,使用map,key是字符,value记录出现的次数 第二次循环,找到value为1的key在字符串中的位置 代码 python...[leetcode] 387. First Unique Character in a String Description Given 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. 2、代码实现 public class Solution { public int firstUniqChar(String s) { ...
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string. 第一遍s.chatAt(i)的对应count++. 第二遍找第一个count为1的char, return其index. ...
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....
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....
LeetCode-First Unique Character in a String Description: 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",...
Given a strings,find the first non-repeating character in it and return its index. If it does not exist, return-1. 给定一个字符串,找到第一个不重复的字符,并返回其索引。如果不存在不重复的字符,则返回-1。 Input: s = "leetcode" Output: 0 解题思路 这个题目借鉴了一个大佬的解题思路:我们只...