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 (字符串中的第一个唯一字符) 题目标签:String, HashMap 题目给了我们一个 string,让我们找出 第一个 唯一的 char. 设立一个 hashmap,把 char 当作 key,char 的index 当作va ... LeetCode 387. First Unique Character in a String Problem: Given a string, find...
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....
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...
Examples:s = "leetcode" return 0. s = "loveleetcode", return 2.解题思路: class Solution: def firstUniqChar(self, s: str) -> int: hashtable = {} for idx, i in enumerate(s): if i n…
first-unique-character-in-a-string https://leetcode.com/problems/first-unique-character-in-a-string/ public class Solution { public int firstUniqChar(String s) { int[] index = new int[26]; for (int i=0; i<s.length(); i++) {...
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.
Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1. Note:You may assume the string contain only lowercase letters. Example s="leetcode"return0.s="loveleetcode",return2. ...
beat 72% 测试地址: https://leetcode.com/problems/first-unique-character-in-a-string/description/ """ class Solution(object): def firstUniqChar(self, s): """ :type s: str :rtype: int """ x = {} for i in s: try: x[i] += 1 except: x[i] = 1 for i in x.keys(): ...