Roman to Integer || Leetcode EASY 13 || HashMap

Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M.

Symbol Value
I 1
V 5
X 10
L 50
C 100
D 500
M 1000
For example, 2 is written as II in Roman numeral, just two ones 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:

I can be placed before V (5) and X (10) to make 4 and 9.
X can be placed before L (50) and C (100) to make 40 and 90.
C can be placed before D (500) and M (1000) to make 400 and 900.
Given a roman numeral, convert it to an integer.

Get notified about all off campus jobs/interviews and the process.
We are building our website and it will be back soon with lots of content till then subscribe us on youTube.
https://t.me/tech_geek1

Interview Preparation Sheet: https://youtu.be/7R5BFkyTzms

Link for Leetcode solutions: https://youtube.com/playlist?list=PL-MLvypZSUl8uBexACBTUvBQesiaL4zrh

Link for placement series:
Placement 2022: https://youtube.com/playlist?list=PL-MLvypZSUl8ZFUkt_dbS3PdB7HxdwWl2
Placement 2023: https://youtube.com/playlist?list=PL-MLvypZSUl_y6kadPknXgbXLlotSmLXu

#leetcode #leetcodesolution