摘要： Given a roman numeral, convert it to an integer.Input is guaranteed to be within the range from 1 to 3999.简单的字符转化，将读取的字符每一位转化为对应数字，再计算。时间：58ms代码如下：cla... 阅读全文

摘要： Given an integer, convert it to a roman numeral.Input is guaranteed to be within the range from 1 to 3999.将不同罗马字符和对应的数字做成字典，然后将依次转化。时间：55ms代码如下：class ... 阅读全文

摘要： Givennnon-negative integersa1,a2, ...,an, where each represents a point at coordinate (i,ai).nvertical lines are drawn such that the two endpoints of ... 阅读全文