- First, we need to list all
atomicroman numbers, including variant like
900, 90, 40....
- For example, we list 90 instead of 80 is that 90 can be expressed as
XC, but 80 is not
numis not 0, minus it with the
biggest atmoic roman numavailable.
- Keep doing this till num is 0.
Roman numerals are represented by seven different symbols:
2 is written as
II in Roman numeral, just two one’s added together.
12 is written as
XII, which is simply
X + II. The number
27 is written as
XXVII, which is
XX + V + II.
Roman numerals are usually written largest to smallest from left to right. However, the numeral for four is not
IIII. Instead, the number four is written as
IV. Because the one is before the five we subtract it making four. The same principle applies to the number nine, which is written as
IX. There are six instances where subtraction is used:
Ican be placed before
X(10) to make 4 and 9.
Xcan be placed before
C(100) to make 40 and 90.
Ccan be placed before
M(1000) to make 400 and 900.
Given an integer, convert it to a roman numeral.
Input: num = 3