Given a list of strings words representing an English Dictionary, find the longest word in words that can be built one character at a time by other words in words. If there is more than one possible answer, return the longest word with the smallest l
Level: Medium 题目描述: Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, determine if s can be segmented into a space-separated sequence of one or more dictionary words. Note: The same word in the dictionary ma
给定两个字符串 s 和 t,它们只包含小写字母.字符串 t 由字符串 s 随机重排,然后在随机位置添加一个字母.请找出在 t 中被添加的字母. 示例: 输入: s = "abcd" t = "abcde" 输出: e 解题思路:该题的解法和上一篇我们解决问题的思路一样,同样此题我们需要定义两个数组arr1和arr2分别存储字符串s和t每一个字符出现的次数,遍历统计字符串每一个字符出现的次数,最后遍历,找出arr1和arr2不相等,不相等的坐标存储的就是字符串t中添加