LeetCode 1945. Sum of Digits of String After Convert in F#

URL https://leetcode.com/problems/sum-of-digits-of-string-after-convert/description/?envType=daily-question&envId=2024-09-03 Code https://github.com/syohex/dotnet-study/blob/master/fsharp/leetcode/challenge/202409/sum_of_digits_of_string_after_conver...