包子糖Sakura

摘要： ##Roman to Integer > Given a roman numeral, convert it to an integer.首先介绍罗马数字罗马数字共有七个，即I(1)，V(5)，X(10)，L(50)，C(100)，D(500)，M(1000)。按照下面的规则可以表示任意正整数。重复... 阅读全文

摘要： Longest Common PrefixWrite a function to find the longest common prefix string amongst an array of strings.题目的意图It seems that it is not to check betwe... 阅读全文