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The numeric system represented by Roman numerals is based on the following seven symbols (with corresponding Arabic values): Roman numerals are written from largest to smallest and from left to right. For example, 2080 is written as MMLXXX, which is MM (2000)+L(50)+XXX(30). On the other hand, the numerals for 4,9,40,90,400, and 900 are written by subtractive notation. For instance, 4 is written as IV, and 9 is written as IX. Write a function that converts an integer to its roman numeral representation. Constraint: - The integer is in the range [1,3999] Example 1: Input: 2023 Output: MMXXIII Example 2: Input: 1999 Qutput: MCMXCIX