摘要：
Question：Write a function to find the longest common prefix string amongst an array of strings. 问题描述：从一个字符串数组中找出所有字符串的最长前缀。 note：当字符串数组为空时，返回"" LeetCo 阅读全文
摘要：
question：Implement atoi to convert a string to an integer. Hint: Carefully consider all possible input cases. If you want a challenge, please do not s 阅读全文