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Solution: Integer to Roman

Discover how to convert integers into Roman numerals by applying a greedy strategy that selects the largest valid Roman symbol repeatedly. This lesson helps you understand the rules of Roman numerals, including standard and subtractive forms, and implement an efficient approach with fixed time and space complexity.

Statement

Given an integer, num, convert it to its Roman numeral representation.

Roman numerals are built using the following 77 symbols:

Symbol

Value

I

1

V

5

X

10

L

50

C

100

D

500

M

1000

Roman numerals are constructed by converting each decimal place value from highest to lowest using these rules:

  • If the value does not start with 44 or ...