Integer to Roman
来源：互联网 发布：pat 知乎 编辑：程序博客网 时间：2024/05/16 19:32
Integer to Roman
Given an integer, convert it to a roman numeral.
Input is guaranteed to be within the range from 1 to 3999.
Roman Numerals, as used today, are based on seven symbols:[1]
Numbers are formed by combining symbols together and adding the values. So II is two ones, i.e. 2, and XIII is a ten and three ones, i.e. 13. There is no zero in this system, so 207, for example, is CCVII, using the symbols for two hundreds, a five and two ones. 1066 is MLXVI, one thousand, fifty and ten, a five and a one.
Symbols are placed from left to right in order of value, starting with the largest. However, in a few specific cases,[2] to avoid four characters being repeated in succession (such as IIII or XXXX) these can be reduced using subtractive notation as follows:[3][4]
- the numeral I can be placed before V and X to make 4 units (IV) and 9 units (IX) respectively
- X can be placed before L and C to make 40 (XL) and 90 (XC) respectively
- C can be placed before D and M to make 400 (CD) and 900 (CM) according to the same pattern[5]
An example using the above rules would be 1904: this is composed of 1 (one thousand), 9 (nine hundreds), 0 (zero tens), and 4 (four units). To write the Roman numeral, each of the non-zero digits should be treated separately. Thus 1,000 = M, 900 = CM, and 4 = IV. Therefore, 1904 is MCMIV. This reflects typical modern usage rather than a universally accepted convention: historically Roman numerals were often written less consistently.[6]
- Integer to Roman & Roman to Integer
- Integer to Roman & Roman to Integer
- LeetCode Roman to Integer && Integer to Roman
- 【leetcode】Roman to Integer | Integer to Roman
- Leetcode - "Roman to Integer" & "Integer to Roman"
- LeetCode:Roman to Integer,Integer to Roman
- Integer to Roman and Roman to Integer
- LeetCode Integer to Roman & Roman to Integer
- Roman to Integer/Integer to Roman
- leetcode - roman to integer & integer to roman
- "Roman to Integer" and "Integer to Roman"
- Roman to Integer &&Integer to Roman
- Roman to Integer and Integer to Roman
- Roman to Integer/Integer to Roman
- LeetCode:Roman to Integer
- LeetCode: Integer to Roman
- LeetCode: Roman to Integer
- LeetCode Integer to Roman
- AC 210+之后突然想整理些什么
- Median of Two Sorted Arrays
- Django auto_now 与 add_now_add
- Max Points on a Line
- Struts中的action
- Integer to Roman
- NoSQL:单服务器如何应付每秒75万次查询
- Roman to Integer
- 黑马程序员_java面向对象_构造函数
- LeetCode题解：Divide Two Integers
- LeetCode题解：Sqrt(x)
- Django 数据库操作
- Django View
- Django template
