2018年1月9日
[LeetCode]387.First Unique Character in a String
摘要： 题目描述： 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" ret 阅读全文
posted @ 2018-01-09 16:19 zlz099 阅读(124) 评论(0) 推荐(0)
[LeetCode]345.Reverse Vowels of a String
摘要： 题目描述： Write a function that takes a string as input and reverse only the vowels of a string. Example 1: Given s = "hello", return "holle". Example 2: 阅读全文
posted @ 2018-01-09 15:39 zlz099 阅读(127) 评论(0) 推荐(0)
[LeetCode]344.Reverse String
摘要： 题目描述： Write a function that takes a string as input and returns the string reversed. 思路： 逆序输出一个字符串第一种方法：从尾到头遍历原字符串，返回到result中。但提交提示超时了，给了一个巨长无比的测试用例。第 阅读全文
posted @ 2018-01-09 11:21 zlz099 阅读(106) 评论(0) 推荐(0)
[LeetCode]202. Happy Number
摘要： 题目描述： Write an algorithm to determine if a number is "happy". A happy number is a number defined by the following process: Starting with any positive 阅读全文
posted @ 2018-01-09 09:55 zlz099 阅读(146) 评论(0) 推荐(0)