LeetCode 13. Roman to Integer

LeetCode Problem No.13. No.12 is here. modalsoul.hatenablog.com 13. Roman to Integer Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. Given a roman numeral, convert it to an integer. Example 1 Input: s = "III" Output: 3 Explanation: III = 3. Example 2 Input: s = "L…